I'd like a Voidcritters overhaul. Instead of being completely type-based, type advantage just adds a factor in winning. Card level should be the main factor in deciding a win, since you need to train up your Voidcritter and win battles to level it up. It's so dumb that hours/days/years of hard work can be completely and totally trumped by a random person's level 1 card they just found. If we got a Voidcritter aspiration, one of them could be to max out one of their card's levels and win a bunch of battles.
I'd also like more Voidcritters merch. These things are like Pokemon, and Pokemon has a staggering amount of merch. I know when I was a kid, EVERYTHING I had was Pokemon merch, or covered in Pokemon merch.