A Different Sort of Kefka Hack

I'm attempting to make as little change to the events as possible, since as far as I understand dialogue changes are the easiest things to change, and drastically altering the flow of the game's events is much harder. I want the hack to be doable, and not insanely hard to create. To me, it seems that hacks that are too ambitious have trouble getting made at all.
I do have small events peppered in the script, but they are optional, like for instance I write in,
(If possible, have Kefka laugh here with SFX)
(If possible, have dog bark here with SFX)
(If possible, have bird chirp here with SFX)
Also, I think in the second world map, Kefka needs to be the character you start with, and not Bird (Celes.) And Bird needs to be acquired by other means in the second world map (I dunno, have him hang out where Terra would be?)
And the event where you use blitz to defeat the boss, I would like it to be changed so you don't have to use blitz, so the ability can be removed.