I like these various cosmetic options. Skins, if you like.
New art was suggested at one point, however that costs devs a lot of money and has system implications / memory use etc etc for implementing. Shame, as it'd be nice.
Upgraded card look and feel might be nice.
I'd rather see this come with 'use that troop 100 times' requirements (with a money or gems purchase option to help monetise), than any form of ascension.
Yeah like he said.
Even better, could add personalised card-frames (skins again )... even one different design per kingdom, which only applies to Mythic cards... e.g. Broken Spire frame is brown/blue tinted, with red dragon tails/wings entwined... etc... Unlocks at say kingdom power level 9 or 10, or can be purchased for cash or gems...