I've been thinking about something. Ridley, K. Rool, and Banjo were all pretty well-requested characters back in the Brawl days, right? The thing about that is, I could actually see their Ultimate movesets fitting in Brawl. I mean, they do have a couple of unusual complicated moves, but like... Melee gave us Judge, and Brawl had Olimar in it. We may not have had stuff like Hero or Steve back then, but stuff could get way crazier than what the Ult characters I mentioned have.
What I'm leading up to with this is: I wonder if that was deliberate? Like, as a way to get their movesets to reflect that they've been around and requested for a while. That's kind of a fun idea.
But then again, Incineroar, Piranha Plant, and Byleth also have what I would consider "Brawl-y" movesets, and they weren't popular requests at the time. This probably isn't true at all, actually.