Indeed, in Genesis the word good is used to describe each complete step, and very good at the end of the sixth day. Elsewhere, that same Hebrew word is translated to mean merry and better in context.
Moreover, your analysis of the word perfect is supported by these Scriptures:
I in them, and thou in me, that they may be made perfect in one; and that the world may know that thou hast sent me, and hast loved them, as thou hast loved me. John 17:23
But when that which is perfect is come, then that which is in part shall be done away. I Cor 13:11