The reason I didn't do that is because of 2 reasons:
1. If you only look at the SNES version, there's literally no indication that Death Hand belongs to DD class (nor Dervish belongs to DL class). Therefore, it didn't make sense to think that Death Hand belongs to DD class.
Sorry, but I disagree. The palete locations are exactly that indication. Inside the ROM's memory, the palettes are ordered by class and all follow the same order, the very last palette for Kevin is Death Hand, even though the class branching on the menu indicates otherwise.
The palettes are flipped and completely wrong for these two classes (and no other for any other character). What this results in is the palette for the status screen render and sprite to be horribly mismatched (I'm talking vanilla game here) and this doesn't happen to any other branch of any other class.
So, assuming they intended Dervish to be DD at some point, they certainly forgot to change things around (which I don't believe is the case, or the remake would also have made Dervish into DD, considering all the class branching is the same, except Kevin's final Dark ones; I can't see this as anything other than a correction.
Also the God Hand/Dervish pairing makes absolutely no sense at all as the extremes for Light and Darkness, IMO.
2. The Balance patch can also be used by Trials of Mana, and that game uses different names for many classes, including Death Hand and Dervish (I think they're called Fatal Fist and Enlightened).
Indeed, it's true the names change, but the branches themselves don't, so I had to ask what you consider as DL on your change list so I can choose a class for Kevin next time I play based on your changes.
So just to be sure, it's the Dervish that gets these?
Body Change, MT Moon Saber, Life Booster, Half Vanish.
I like these changes by the way, Dervish is my favorite Kevin class.