I think the game is looking.... alright. I'm hoping it's going to be very different from Fates, that's for sure. I like that there appears to be two specific avatars, instead of a fully customizable one. It'll make animations look better, perhaps give them a dedicated voice actor, and they can appear in cutscenes. The story seems to be a little more serious in tone and nature, and while the art style hasn't grown on me yet, I'm one of those people who still prefers the GBA games sprites to Awakening so I guess I'm just weird like that. XD
Personally, my big concerns are twofold: firstly, I really dislike that cutscene animation style. I didn't like it in Echoes, I don't like it in Beserk, it just feels too... jerky. I wish they had stuck with the beautiful cutscenes in Awakening but... I guess this is a permanent change. My other concern seems that it might be a little too freeform. I think Fire Emblem works best as a game that is a little more linear, and while it might be very elitist of me to say this, I really liked the difficulty of having to plan each chapter out in advance, and having to handpick a group of units. While I understand that opening up the map in FE8, Awakening, Fates and Echoes allowed for a wider audience to get brought in by making the game easier, I still love that feeling FE6 and 7, heck, even in the earlier games like Geneaology and Thracia where you had to plan chapters in advance. It added a lot of strategy. This game kinda looks like... you'll have a hub world where you'll be able to train each individual unit to max, and go on missions and such. That's definitely still fine, but i feel like it makes it harder to get attached to specific units when you can just have all of them.
I also hope they take out the "marry anyone to anyone" and the child characters from Fates. It was done well in Awakening, but Fates really botched the formula for that and left a sour taste in my mouth. And no translation censorship plz!