Single Santification Reset's

[Herby]

Heroes will become too overpowered.
Coiners would get too much of an advantage.

Imagine Adamanti, Angel V, with +225 crit.
Or Saffron, Half Angel V, with +150 dodge.
Or any hero with +60,000 hp (half angel V), or +90,000 hp (Angel V).

Too OP.

Coiners don't use the Tavern to get cards. They buy them from the Fair.
10 Saffron or Cianna cards only costs ~2500-3000 gems. A paltry amount for most medium coiners even.

Being able to customize single Saint attributes would also make all heroes look alike in the long run. No variety.