I'm playing right now and overall while I think the game is fine I'm having difficulty wrapping my head around the combat. Finding it a bit too hard atm. I did the weakest version of the Titan simulation fight at level 21 with all three divine shrines discovered and it took me 10-20 attempts.
It's tough to see enemy attack telegraphs and when there are more than one non-trivial enemies to fight it feels like a pandemonium.
One thing I forget to use a lot but are useful is synergy skills. They bump up the ATB of both synergy characters so try to mix them in every now and then, because they help speed up being able to use characters you aren't actively using.