Been lots of griping about vaulting and tokens lately. I think they really need to find a way for players to personalize tokens. Say strip the token type off of all tokens just have the rarity level. And allow players to redeem their tokens on any reward page they want. Add in several new choices.
Standard/heroic - All characters available at equal rates tiered by rarity
Event(s) - Featured heroes have better draw rates, everyone else lower/none
Deadpool’s Daily - Character featured in DDQ has higher draw rate
Avengers - Higher chance at avengers
X-Men - Higher chance at X-Men
Villains - Higher chance at villains
Miscellaneous - anyone not in one of the groups above
Red - Spend a token get a random red cover
Blue - Spend a token get a random blue cover
Green - Spend a token get a random green cover
Purple - Spend a token get a random purple cover
Black - Spend a token get a random black cover
Yellow - Spend a token get a random yellow cover
So you earn tokens at the same rate as currently but you can choose what odds you want for redeeming that token. Got 100 tokens and want to bet everything on red, go for it! Go swim in that pile of repulsor blasts and headbuts. Nothing is a sure thing still but you can maximize your odds a little and if you finish off one group you can never spend a token there again. Oh and if we had something like this we could stop vaulting forever as a side bonus.