Nope, it's by far not anywhere close to being the best. Graphics have gone down a level, the story seems to be choppy and unbalanced to how much you're exposed to it. It lacks fun mini games. The fighting is great, but sometimes too difficult for me. The voice acting seems much stranger in this one to me, as most of the time it doesn't match the characters' mouthing as with X most of the time it did. I suppose it's all because it wasn't made by the same people who did all the other XI. Nobuo, Hinorobi, and Amano are the best!
The characters lack diversity as well with License bored being the problem with it, the Sphere grid definetly changed that in X Tidus was speedy, strong, and was in charge of increasing the party's turns, and decreasing the enemy's. LuLu was evasive and had high magic attack and resistance, while Wakka was profficient in taking down aerials and causing status ailments. I know you could practically make anyone have any abilities, but you can't do that from start, when teleport stones, and key spheres are scarce, most people will go with the default path anyway.