I recently beat Persona 3: FES and it was a wonderful game, it was a little bit harder than Portable but I kinda expected it because of its age, it's bound to be a little clunky. The uncontrollable squadmates aren't too bad as long as you know how to use the tactics menu, if you don't, you're in for a bad time. The jealousy mechanic was pretty annoying, and it made things harder for literally no reason, so I definitely despise this mechanic and I'm glad it's not in any of the other games. Overall, I rate it higher than Portable. Actually being able to actually walk around the environment instead of having everything be point and click is nice, and the cutscenes definitely made the emotional moments hit harder.
All in all I think it's a 9/10, I liked it a lot.