Need to get something off of my chest. I personally don't like the Echo Fighters idea much.
Yes, clones have been a thing for every game, but at least, previous games felt like there was some effort put into those clones.
In the past games (except Dark Pit), they felt like different characters because they had different attributes, moves had different effects, that kind of stuff.
Echo Fighters, with the exception of Lucina due to no tipper, are essentially gonna be like Dark Pit, having the same moves and attributes, but with some properties changes in a move or two along with unique coemstic stuff like idles and taunts.
I'm sure there's a reason for the devs to not be as imaginative as before with clones and just copy-paste the moveset entirely for these Echoes, but I'm still really iffy about it personally.