I honestly suggest that cards like reno gets a change. It should be that their effect occurs if you made a deck with no duplicates, and not if you have no duplicates in the deck at the time. When you meet plague DK, your deck is just gone if its a reno deck. Your effects wont trigger. I also have an issue with wheel warlock being able just to play reno cause they destroy their deck. This is also the case with decks like druid (even warrior at times), where they just draw so much that they can play reno lategame regardless.
I feel a change is in order. I Feel like not having it this way just ruins the whole point of making a no duplicate deck when you can just draw towards the effect. Also its just annoying meeting plague DK with a highlander deck right now since its just an insta loss