Steve,
Thank you for your feedback. I appreciate you showing your stance as it relates to God's Word. I don't think we are seeing eye to eye partially because I haven't properly communicated when I am commenting about the "law" perspective and when I am communicating about the "fulfilled law" perspective. Additionally, I believe we have a different view of the law. My understanding of the word law is that it pertains to all that we "are to do". There are certainly different categories in which these fit into (Law of Moses, Prophets, Words of Wisdom, Jesus' teachings, epistles teachings- both exhortations and commands, etc.), but the commands are often linked, modified, and restated. I see this picture of God's righteousness across scripture and these acts we "are to" do. As long as we "are to" do them, they are a requirement (as law) and the penalty for breaking these commands (lawlessness), which is sin, is death. The law brings death.
Romans 7:10 "and this commandment, which was to result in life, proved to result in death for me"
Romans 8:2 "For the law of the Spirit of life in Christ Jesus has set you free from the law of sin and of death"
1 Corinthians 3:7 "But if the ministry of death, in letters engraved on stones, came with glory, so that the sons of Israel could not look intently at the face of Moses because of the glory of his face, fading as it was"
I view an exhortation differently. Since Jesus fulfilled the law, (and He had to have fulfilled it all, or else there would be Biblical commands left unfulfilled- by us first, and by Jesus secondly- which would result in spiritual death for us) there are many N.T. exhortations for us to be who we are. These serve as a reminder to me of who Christ made me- new, pure, and blameless.
Examples of exhortations would be:
Romans 12:1 "I urge you"
Ephesians 4:1 "I implore you"
2 Corinthians 6:1 "I urge you"
1 Thessalonians 5:14 "We urge you"
1 Peter 2:11 "I urge you"
2 Corinthians 5:20 "we beg you"
Galatians 4:12 "I beg of you"
1 Corinthians 1:10 "I exhort you"
I think it is important to distinguish between what the Bible exhorts us to do and what the Bible commands us to do. The commands are law, but the exhortations are encouragement.
When I state that I wholeheartedly believe that there is no more law for Christians, what I mean is that under a fulfilled law, there are no more applicable commands that require obedience... Christ was obedient on our behalf because we needed Him to fulfill this for us.
Concerning the verses you cited:
What do you believe the law of Christ is? If we make Christ's law another set of commands- it defeats the purpose of Christ- to fulfill commands and make us holy.
Romans 8:2 "For the law of the Spirit of life in Christ Jesus has set you free from the law of sin and of death."
I believe the law of the Spirit of life in Christ Jesus is the law of Christ which you referenced.
Romans 10:4 "For Christ is the end of the law for righteousness to everyone who believes."
Therefore, why would Christ introduce some new set of commands or "law of Christ" which would require us to perform certain works?
James cites law. If he didn't, he would be contradicting Paul's statement: "For we maintain that a man is justified by faith apart from works of the Law." Romans 3:28
Christ's death covers our disobedience to the law... there is a law and it is in place (not a jot or tittle will pass from it until all is accomplished), but it is fulfilled for Christians, and that is why I state that there is no law for Christians, because we are no longer under it. Romans 3:19; Galatians 3:10, 23; 5:18
Concerning Jewish customs: You mentioned things like, "things distinctly Jewish", distinguishing factors from other societies such as "ritual practices", and "Jewish religion".
I grouped these and called it culture, so I apologize for any assumptions, mis-labelings, or miscommunications. My point was, circumcision is more than distinctly Jewish, or a ritual practice... it is required under law. Poor communication on my part.
Concerning circumcision being required by law, I think we're on the same page.
Concerning our need for mercy: This is very interesting... is our need for mercy past tense or present? I think the answer lies in separating the fleshly identity from the spiritual one. Christ died for sins once for all, so if we still need mercy, who will justly give it without compromising God's righteousness? So, spiritually, I believe mercy is past tense because now we are pure in Christ Jesus through faith, by grace. However, we continue to sin in our flesh, so His mercies are new each day
Steve, when I referred to obedience to Christ, I should have stated, "obedience to Jesus' commands". I believe obedience to Christ is placing our hope fully in Christ's atonement- it is receiving grace. I believe we as Christians turn Jesus' commands from law that He fulfilled, into law we are now under again. This is why I referred to it as cleaning the outside of the cup...
I apologize for my poor communication... this is great practice though

I'm not being sarcastic- I know it is hard to tell sometimes with the written word.
Concerning children and obedience... this is a great example of the core of what's on my heart: under God's law children are responsible to obey their parents. However, they cannot fulfill this perfectly, as the law requires (James 2:10). If they are responsible they are condemned because they have disobeyed God's command. Since Jesus died for this, it becomes His responsibility. I do have children and I teach them God's laws, because I believe the applied law leads us to Christ- when the Spirit leads I explain the Gospel more eloquently to them.
Where I stated that we must be obedient and if we fail, we fall from righteousness, I was stating 2 lawful statements. We now have been credited righteousness, although we previously fell from it.
I believe the phrase, "we are responsible to" means we must- it is a responsibility and we must prove faithful. I see now how "we should" can be interpreted differently.
I get your point about mercy being obsolete if there is no debt owed... I guess what I'm trying to say is that Jesus paid the debt (past tense) and so no current debt is owed... we exist in spiritual life, in His Spirit because of mercy (and in this worldly life we continue in it), but spiritually, mercy was given (past tense) and now we run in His love.
I believe separating the perspective of flesh from the perspective of spirit is crucial to this whole discussion.
Concerning your last point: I believe this relates to my earlier comments about exhortations verses law/commands. Romans 12:1 is an exhortation and the context of Romans 6:13 is not about us making our members (flesh) presentable, but about us offering the parts of our body to God- He will use it as an instrument... let's let the Master Musician do the playing as our true lives are hidden in Him and we live this life completely by one faith, with one hope. This sounds to me like Good News. If I have to do the presentation/performance then I tackle once again a burden I already let Christ carry.
May God bless you.