My personal favourite FEs are Echoes, Thracia, and Conquest, in that order. Those second and third choices should tell you how gameplay-focused my tastes are. And for me, this game is a joy to play.
However, everything you've heard about Echoes that gives you pause is probably true. The combat scenarios are not even close to as tightly designed as the best FEs, there's less customization, fewer options in battle, and so on. The thing is, the game still works, because it feels so different that you don't find yourself missing what's absent. It doesn't feel necessary.
Despite my love for the game, I cannot reasonably say that its combat is top-tier. But I implore you to give it a chance anyway.
agreed with this,couldn't quite put my finger on why i'm enjoying myself as much as I am so far when I agree with most complaints about it but this sounds about right
I do feel like a lot of things about it would get old if it wasn't just a one off though