Final Fantasy originally started as a game that would supposedly mark the end of Sakaguchi's career if the game did not sell well. It sold well and was critically acclaimed, and obviously it's impact was felt as there are so many main and spinoff titles, some of which have a spinoff themselves.
The Last Story, according to almost every JRPG fan I have spoken to about it, is one of the best RPGs of this generation. The ONLY criticism that I hear from people (REAL PEOPLE, not internet people who complain about the stupidest, tiniest shit) is that the game is too short - but can be expanded if you do the sidequests.
My question is, do you hope that we'll see a sequel or some sort of continuation to this series? The fact that there was enough fan reaction to get a PAL and NA release is one thing, but the fan reviews are excellent. There are some printed critic reviews out there that say the opposite, but they're paid to actively seek out flaws in a game.
Even FF1 at the time had its fair share of critical complaints... one being the scarceness of random encounters. And look how far that franchise has gone.