Did a 100% playthrough with this hack and it was fantastic!!!!
Found two major game-breaking bugs though, I had to "revert" to vanilla in order to circumvent them:
1.-Gremling Soul has wrgon ability description, it says "BLUE CROW", also its naming in the soulset list displays garbage test and, when trying to select it, it crashes the game so you are forced to reset.
2.- Erinys drops Stolas Soul instead of its own, making impossible to get 100% soul rate as Erinys soul is impossible to get.
Other than that, everything was great, loved your color choices for Underground Reservoir and Dance Hall!!