I like the importance of timing your attacks on the time line, making sure your attack don't get interrupted and trying to interrupt their attacks, it's a very nice innovation, I haven't seen in other TB-games.
Grandia says hello.
Ah, never played that one. Looks fun!
I'm really surprised by the gameplay and the combat though. I wasn't expecting much, but it's much deeper than I thought. One reviewer said that the rpg-elements are paper-thin (or something like that), and while it's certainly not complex, it's more complex as an rpg than Mass effect 2, or even mass effect 1. Two games that have been hailed as "great rpgs". It's also very comparable in complexity to many of the FFs, also the early ones.
So far the game seems quite open, I might be mistaken, but I've encountered at least one very big area which you can just skip, and since you seem to be able to skip just about any fight, it seems like you can explore at will. I dunno, maybe it is more linear than I think, I haven't played it enough yet.
Also the combat. In many jrpgs, especially FF, also the earlier one including the "legendarily difficult" FFIV, you can win many non-boss fights by just mashing the x button (attack, select monster, rinse and repeat), not so in this game, and it punishes you heavily most of the time if you do a timing mistake. There seems to be no level scaling, and as I ventured deeper into the kingdom I encountered many monsters that kicked my ass. There also seems to be a lot of completely optional mini-bosses, I also like that they took the rock-paper-scissor gameplay of the elements, which is a classical trope of the Jrpgs of old.
I also like the FF-X system of being able to exchange companions at will. Edit: Though being able to change out downed companions, which I just discovered, is decline.