I'm getting pretty far into Tales of Zestiria. As a longtime fan of the series, (I played quite a few of them, but not all. There's, like 20 games if you include spin offs) I have to say that this is shaping up to be my favorite of the series. I love the world and mythos that they've built up. It's full of JRPG tropes, such as what I like to call the "cyclical Jesus" plotline. That's where every few generations, a great savior arises and fights back the evil of the world. And of course, there are two warring nations pushing the plot along. However, the game goes out of its way to establish that neither nation is in the right, they are just humans who are being led into war by those in charge.
Basically, you're the new jesus. And I mean that pretty literally in the context of the game. You are the only human who was raised by angels (they're even called the seraphim) who must become the savoir of the world. You roam around exorcising demons (even the demons are fallen seraphim). It's been interesting to see how the christianization of asian culture has led to a fast and loose interpretation of the christian mythology. The main character is innocent and playful, but also a little serious, so he's not super broodarific, but also not a total clown. Some of the biggest issues I have with JRPGs are with their annoying as shit main characters.
I also like the combat system. As with all Tales games, it's an active battle system but the twist on this one is that the seraphim that are fighting along side you can merge with you to make you super powerful for a short period of time.
The equipment system is also pretty interesting in that it has various modifiers on weapons and armor that can be transferred to other weapons and armor by fusing them together. The different types of modifers fall into specific categories, such as defense, focus, magic power, and such and the modifiers fall under specific elements. When you have combinations of elements or modifiers, they activate bonuses for the weapon or armor, or even for the whole party. Plus, the fact that you merge weapons means that you're not constantly dumping your old ones as soon as you hit the next area.
There's also various side questery to be had, such as finding all the little dudes that can add specific modifiers to your armor like little helpful pokemon.
Overall, I have to say that I love it. I think it also looks really good for a relatively old game (it was originally released for the PS3 in Japan and only recently ported over). I'm still amazed at how they can capture the anime look with 3d models nowadays.