The problem I see is vet players are going to have a gaping hole in some of their collections for non perfect gear in some content. I have no desire to farm normal maelstrom for example.
Is there plans to have it so that if you unlock a Perfected item, it will also unlock the Non-Perfected version (not vice versa obviously)?
The best system would be that Perfect/Non-Perfected items are compatible with one another but do not provide the Perfected bonus unless 5 piece requirement is met. That way, Perfected could simply override the Non-Perfected in the collection book. If that is too onerous, have it so that finding a Perfected also unlocks the Non-Perfected equivalent similar to how if you complete a Dungeon on Veteran you also get the Normal achievement.