I should mention that I'm not the biggest Fire Emblem fan. I really liked Awakening and got through Fates and Three Houses but I haven't really finished any of the previous titles and I'm probably not going to play them.
That being said, this game was ok. I know people who absolutely love it and I'm glad for them, I personally don't enjoy Fire Emblem like this.
The story was unbearable to me, i could not sit through any of the cutscenes for longer than 30 seconds. I dislike the designs a lot and while I can see that the people who worked on this game are certainly very talented, I think that they tend to over design and I just find everyone ugly.
The characters are very one note and i don't enjoy their interactions. I guess it's just a little "too anime" for my taste.
The Engage feature is cool at first but gets a little stale after a while. I did think the maps were cool though and enjoyed playing the main game itself.

I guess I'm just not the right demographic for this game. I'm glad for all the Fire Emblem fans that they're making more games and I really hope I can enjoy the next entry in the series more than this one.