Do you have any idea how long FFXII was in development? Taking their time isn't a problem.
For that matter, I disagree. I liked the PS2 FF games. Even X-2 had it's redeeming qualities (I don't feel the overall story was that bad though most of the side stuff blew, and the gameplay was great). I don't feel there is a problem with the series. It's simply been in a constant state of evolution since the beginning of the series. I also don't think I'd want to see them hand it off to anyone else, because frankly, there aren't many companies out there that have the talent to put out a decent story, on par with even Square's PS2 offerings as far as I'm concerned. If you didn't care for the PS2 games as much, then obviously you'd disagree with me, but I still find that the PS2 FF's are generally some of, if not the best RPG's I've played since the PSX generation.