Yeah, the graphical improvement is really noticeable, complaints about the art style aside the game actually looked good. I think one of the big signs of 3H's quality is that you could fully enjoy it without being bothered by the fact the game looked like garbage (I have nearly 400 hours between all 4 routes and not a single time I was bothered by the graphics).
Now that I know I am skipping the next FE - I know it's very stupid to skip a game because of its art style, but they are using one that even as a teenager would keep me away from any anime/game that had it - I might as well buy Three Hopes (aka FE Warriors 2).
I am not a fan of Musou games but I tried the demo and it was pretty fun. For those who missed it, it is a "what if" scenario where Byleth doesn't meet the House Leaders and because of that doesn't join the Academy.