I think it's because Square is changing. Some people say that Square is completely about graphics now and are repeating storylines with a little bit of change to them.

In my opinion, the older stuff (and by older stuff I mean like FFVII and FFVIII because I haven't played any thing before FFVII, besides the new FF1 and FF2.) is good and FFX is good. I didn't like FFX-2 all that much, but it's still good.