More is always preferred. :D
Change the title. I also want more slots for card decks, so call it "more game and card slots". :P
Together with the new keyword system, I want to build 1 card deck per theme (eg undead, unliving) and play test one by one. I don't need to remove and redo when I try other themes. Different playstyles (eg construction, destruction) occupy 4-6 slots. Different themes takes 10+ slots.
If it doesn't stress your server, I hope you can raise the max to 20 card decks (too greedy?). ;-)