With all those upgrades and "%" here and "better" there... I'd love to have some kind of RPG character sheet, which tells me immediatly what I have and what I dont have (or how much of it).
Similar to the "Quoin multiplier" information on top of your upgrade file. Just not only for Quoins, but for everything else as well (chances to get imagination, percentage for gems, and so on...).
Otherwise, it's quite confusing. I just pick cards and collect them, but I have no clue which are the cards that I should look for especially, or which are the tasks that are most rewarding for me at this moment. It's just too much.