I think it would be useful to have a way to sort our collection into distinct parts, not only the inventory as a bulk of all the cards one owns.
What I mean is I for instance have a Collection of Angels and also some Promo collections and keeping those in separate tabs would help me a lot in organizing them.
Also from what I read one of the major updates will be to specify what set a card is from and if it is foiled or not. Adding to this a way to specify the card Language and condition (NM, SP, etc) I think would help also.
Thank you and keep up the good work on this great tool.