At first blush, this seems possible. However, words like "holy" and "just" are adjectives, to which a great number more may be added in describing what God is like. They tell us what kind of God He is. He is good, faithful, just, compassionate, holy, etc. These are all descriptors.But was John's statement that "God is love" meant to be any more than a partial description? What, scripturally, would cause us to think so, any more than He is holy and He is just?
John deviates from this pattern three times, wherein, in each case, he follows "God is..." with a noun, not an adjective:
God is Spirit (John 4:24)
God is Light (1 John 1:5)
God is Love (1 John 4:8)
It seems that these statements tell us essentially what God is, rather than what kind of person He is. I am not saying that the various adjectives do not tell us anything about what God is in essence. In fact, just the opposite. I would say they tell us things that are true of Him because of what He is in essence. However, they are different kinds of statements.
If the Bible somewhere said, "God is holiness," or "God is justice," or "God is wrath" (all nouns), we would have as much reason to see these things as descriptions of His essential being in the same sense that He is love (or light, or spirit). The absence of such language, I think, supports Matt's contention.