It'd be nice if Logos added the ability for us to periodically complete all of our collections contained in our Base Packages as new books become available. For example, as new volumes become available for various collections contained in Platinum, I could "top off upgrade" my Platinum collection, ensuring I get all the new books in the various collections that have been released since I purchased Platinum.
Additionally, this feature could work if I were to go for a higher collection as well. For example, if I decided to go from Platinum to Diamond, in addition to getting all the new resources in Diamond, any additional resources added to the collections contained in Platinum since I last purchased Platinum would be included as well.
It'd be another way I could keep track of collections I own and ensure I have all the latest books to them as they become available.