It'll be interesting to see the full roster reveal and most likely a fair amount later in DLC. MOTW was pretty out there compared to the earlier games, not only were there a bunch of weird new characters but the roster was pretty small. There are quite a few characters between all the FF games, I really hope they don't add too many weird new characters as SNK's character design isn't what it used to be (to say the least) and a lot of old characters deserve to come back.
I do agree that the graphics are disappointing, though I didn't expect anything else. KOFXV looked pretty dated when it came out and this is going to look incredibly dated a year from now. They desperately need to do something actually modern and less generic, there's zero personality or charm. I know we'll never get something that looks like KOFXIII again but I don't understand why they don't just copy Arcsys or something similar.
I'm sure this will play well though, KOFXV plays very well and I did get a very FF vibe from the trailers.