Been saying this from the beginning. Engage Warriors would be amazing with the graphics, world, and emblem mechanic. With extra world building and characterization for the main cast, this game could be a fan favorite. Issue is that FE Three Hopes performed badly in Japan and that is the main audience for these titles... Warriors might be done for.
I completely agree with making echo fighters more unique. The Lucina echo fighter of Marth felt very annoying as an FE fan. She doesn't fight like Marth at all in her games. She fights more like Chrom, and only disguised herself as Marth. However, it was a big plot point in her game that her fighting style *not being that of Marth's* is what exposed her secret identity... And yet Nintendo made her fight like Marth. It doesn't make sense and it just seems so lazy. A lot of the FE characters are missing so much to them. They don't have most of their weapons or their iconic skills, even the DLC Byleth didn't get a Divine Pulse mechanic that could have easily worked like Bayonetta's Witch time or Mythra's foresight.
To me, Nintendo used FE to make lazy "swordfighter" designs to fit a niche, but this hurt everyone's view on FE. Now people go into the series thinking Byleth is some lame weapon dude who doesn't do anything cool. But of course Hero, Pyra/Mythra, and other DLC fighters get the actual moveset improvements. Byleth feels like a base roster pick.