Have you ever thought it was silly that only Year 1 gear can be reobtained from the collections.
Currently even weapons such as Vestian Dynasty which always have the same Perks can't be reobtained, the description always reads, "you can't reobtain gear with random rolls."
My suggestion is to make one Curated Roll of every piece of Year 2 Gear and if any roll of that piece of gear is obtained it would unlock the Curated Roll in the collections that you could then acquire at any time, if you had the resources to obtain it, just simply make them cost a few Enhancement Cores so people don't just take advantage of it some how.