Which bug fixes do you consider indispensable?

Okay, attaching it to this post.  I made generic patches for you based on the C3 hexgrab and the knowledge your chocobo patch conflicts with the Banon Riding patch (which was included in the CV compilation).  I can't give you mine, because I've got changes you wouldn't want (such as added spell learning for Mog, Shadow, Relm and Strago, and applying the monster AI overhaul by Hatzen).
Keep in mind these patches are generic: nothing is better than the legitimate article.  If your combat systems are playing nice and your events aren't, then it would be better to select the hex block C0:0000 to C3:FFFF and copy-paste it to make your own custom patch.

Hopefully you have an unsullied version of your event changes, one before you applied CV or another compilation with event changes?  I was unsuccessful trying to 'unsully' a DivergentPaths ROM that had been blended with CV, but I was able to combat-patch a fresh one.  If you've made significant changes in the C0-C3 banks, you'll also want to watch for patch conflicts: you may need to move your stuff to new addresses once CV to C3 is in place.  An IPS report will help you find the conflict spots, though they're a pain to scour.

I was also able to save and transfer my item, monster, and spell work out of a corrupted rom by hex-grabbing their relevant sections, pasting them in a clean rom, and making a patch from it.  I used this site's map to do so successfully.
https://www.ff6hacking.com/wiki/doku.php...sm:rom_map

Just so you know, I haven't finished my test playthrough yet.  While I have passed the branching paths (and I assume that means there will be no more event surprises), my playtest has only reached the end of the Narshe fight.  I kept having to start over from the beginning to make sure the RAM wasn't doing something funny with an old save, which is why I'm not further along.

EDIT: By the way, be on the lookout for Battle Commands and Character Names. While mine were simple enough to reinstate with FF3USME, you'll probably want to hexgrab them from C4:78C0-C4:7A3F (names) and CF:FE00-CF:FE3F (commands) and D8:CEA0-D8:CF7F.