Wouldn't be way too overpowered if you can collect literally ANY gear from collections after you have it? It would just destroy the economy both for guilds, and both for the sets., and NOT even that is the biggest problem. the biggest problem is you SHOULDN'T be able to collect any gear from the collections. not random rolled ones.
Just look the collections in Destiny games. Random rolls of the weapons/armors cannot be crafted, but the static rolls can be. so i suggest the same into eso too. no random trait crafts!!