It's got a shit ton of bugs or errors(Not the same thing, but they get lumped in together because gamers as a whole can be dumb. Myself included). The count when I last checked was over 300.
Just because the game has been under more scrutiny than almost any other video game, ever, constantly, does not mean it's a buggy game. I'm sure if you put, say, FEDA under an electron microscope for over a decade, you'd probably find a lot more than 300 bugs.
And really, I see no difference between what the FF6 community does and the Bethesda engine games unofficial efforts. Shitting on the FF6 community for trying to fix up a game they love is kind of dickish.
If there was an individual patch for every single bug in Skyrim that was fixed by fans, and there was no guarantee which ones worked with each other and which didn't? Yeah, I gotta say I'd be annoyed by that too.
Right now, over 40% of all bugfix patches here on RHDN are for FF6 (more if you count the GBA port). And, if the "300 bugs" number is correct, then I guess we'll be seeing 235 more patches in the future. I understand why they're all done separately (well....... sorta), and the hackers are free to do so, just like I'm free to complain about it, and you're free to think better of me.
Anyways, the only really bad part of it all is the cool names they give the hacks. I see awesome titles like "Chain of Command" and "Off Death Row" and I think ooh, sounds like a cool ROM hack, but it's just another "in a single part of the game under a single rare condition, Terra wears a hat for a frame" and it's like aargh dammit why did I get excited for this.