No you don't. FFIX is perfect as it is. What you really want is a modern FF in pure fantasy, which could actually happen next if the rumors are correct.
The remaster for X and X-2 was well done and I'd be ok if they never touch that for awhile but if they do remake it, well i wont complain one bit either :D. I'd also love a full remake of VIII. I may be the few that also really enjoyed it but I love the character design and they deserve a much better treatment than the pixel faces lol And if possible...a Crisis Core port. That game was just too good to remain stuck on the PSP. Or ill be fine with a full blown remake since they can reuse the same stuff they used in the FF7 remake
You're right FFIX is perfect, although I was disappointed that they removed the 2nd player mode in the remaster versions, but maybe I was one of the few that had someone else to play and enjoy this perfect game with me locally. But you're right I also do want a modern FF next gen and not just FF7 remake sequels. There's got to be another team at Square already working on FF16 that they wont say.
Honestly, I really do hope the next mainline game is full fantasy, something along the lines of Final Fantasy IV, VI or IX... the closer to IX the better, lol. Any battle system will do since I enjoy both turn based and action, although I guess I would like to see them make a new game that is actually turn based, maybe use the CTB from Final Fantasy X and expand on it somehow, lol.
Calling it now, Final Fantasy XVI is gonna' be action based sci-fi fantasy with a trans main character called Thunder. (Cloud = Male, Lightning = Female... y'know)