Few people will say this game is great. Few people will understand what the game was trying to do. The fact is, the game changed the formula a lot. It was very linear, which is indeed not a very good thing. But the game had something that was missing from some of the more recent JRPGs. It had a battle system that tried something. Sure, part of it didn't work and auto-battle made many people lazy but overlooking this, you can see a great system. Paradigms and shifting can make the game take on many forms. Fighting an enemy that is resistant to most things, what do you do? You have options. You can have to commandos and a sentinel tank it. Sure that means you will likely not get a good ranking.
Or you could be smarter and try to use saboteurs and synergists to give you the edge. Or build the gauge with ravagers. There are many possibilities. This gives battles depth. You can be cheap and auto-battle and tank, but miss out or you can try to be smart and go for the record. It's up to the player.
The other key thing I love about this game is the soundtrack. It is simply brilliant. It evokes emotions at times that most games only wish they could. The boss battle themes for the main antagonist being some of the best in the series.
Sure this game had flaws but if you try to understand what they were trying to do with this game. You will have a great time. The story does fizzle out in the later chapters and it really stops making sense at times. If you are looking for a good time and you can look past some of the flaws, you can have a great time.