So, I'm 12 hours in (from starting yesterday) and, I have to say, I'm actually, genuinely, very impressed with the game. Once you get a feel for the combat, it really has a nice flow. I'm not even that far in or, at least, it doesn't feel like I am, but I kind of feel had I not watched Kingsglaive, I wouldn't have a clue what was going on.
I think the combat gets even better as the game progresses - and, once you get a lot better at it (which likely will take some time) it's super rewarding to start up a new game and see how much of a difference it makes.
I will say the game gets much, much better as you go. I'm really glad it started with a more open world feel to it, but god damn... having linear aspects to it sure did contribute to a great narrative.