Instead of colorless covers: offer a re-spec for some variable of: #of stars x (resell value of unused cover)=randomized color.
if you have a 3* rotting in the queue it could be 3(500iso){1500iso} for a chance to get a new color of the same cover.
I think randomized would be beneficial because it allows for the possibility that you might just get the same cover back and have to retry. so if you have a char at 5/2/5 you may have to try several times to get the right one. If you have a heavy weighted char 1/0/5 and you get a re-spec you would be more likely to accept whatever the outcome.
This returns value to the game in a balanced way vs. 1,2,3…13 colorless covers then champ.
I think it makes sense to have color specific staggered development of a character. It makes the search more fun, it makes you try harder if that one color is awarded at 900 points in PvP, it represents the growth a character has as they become more powerful; not just loading up on the one skill that helps in-game.
-some people would totes avoid the 3hanos black until they had to, have Peggy Sez at 5 and then not really push for her,fully maxed true healers to the detriment of their other strengths.
If the devs won’t consider some form of change to this issue of high rarity covers that are essentially unusable perhaps then the sell price should be upped to represent a meaningful amount.
5* would return an LT
4* HP/CP
3* Heroic tokens/multiple elites
2* Multiple standards
1* meh..more iso?