I saw nothing wrong with those ports. My FFV copy didn't work, but that was about it. No glitches, no nada.
Just an extra three hours of loading time for each game.
You're exaggerating. I played Final Fantasy Anthologies and Origins, the loading times are nowhere near that long. I grew up with the NES and Sega Genesis where load time was unheard of and it still wasn't jarring when I sat down and played those ports.