Sadly, most people misjudged the game based on the beginning parts. It's really great. Battle system aside, which I've written tons of words about already and is well-covered by other people as well, I also really like how the game tackles the subject of how people who have never known anything but constant fear from the threat of Sin will deal with their newfound freedom and comparatively carefree future. Some people complain that they don't like what happened to some of the areas from FF10, but it's pretty obvious that you're supposed to be uncomfortable that, for instance, Zanarkand is now a theme park. But it's fairly realistic -- given the opportunity, respected and revered sites are exploited.
I just think it's really cool, and not an angle you get to see in many games.
Piling on to this. X-2 is super awesome and fun in every way I think. It doesn't take itself too seriously as a story, but it still has some interesting (dare I say, genius) twists on the norm we still don't see repeated today. The bolded is driven home by the opportunity you're given at Zanarkand to confront Cid. The game doesn't get credit for stuff like this when it really should. Change is strange and often uncomfortable; that's what X-2 is all about.
I'm glad you went back to it, OP. I think it's gonna be excellent on PS4 in a few weeks.