I know I'm in the minority on this, but these kind of stages are exactly what makes me dislike the Smash games aesthetically even though I want to like them (and do like their gameplay overall). Not because of the Pilotwings theme mind you, but becuase of the way in which they implemented that theme (explanation following below).
I can't be the only one who strongly prefers stages that feel grounded in the actual game world (i.e. that are on the actual ground or at the very least feel like part of the game world) and that feature a graphical style that matches the detailed 3D models, right? I mean, floating platforms as stages is one thing, but having them float over a 2D pixelated background that is slanted and doesn't fit the perspective of the platforms no less, is just too much for me.
And yes, I know that earlier games had similar stages (like the Mario 64 one in the original game, which had a horrible slanted perspective in which you looked down on the castle while standing on a floating platform that looked like part of the castle's roof). They must be doing it on purpose then, but I simply can't figure out why. Why not just stick to stages like the Earthbound or DK ones in Melee and Brawl that do have a fitting perspective and an art style that fits the character models (and that don't just consist of floating platforms hanging above a random background drawing)? Either you redraw all the old game aesthetics into 3D or don't redraw any of them I would say.
Sigh, of all the franchises never fully to click with me, it had to be the one that combines two of my three most favorite things: fighting and colorful Nintendo characters. If anybody can explain why they DO like these kind of stages with their seemingly copy and paste aesthetics, please do!
I can almost guarantee that even if the stage is just a platform or two above a retro style map, it won't be sitting exclusively at that perspective. There really aren't many stages that just float above the scenery that I can think of - the Animal Crossing is the only one that jumps immediately to mind, other than the moving ones which end up as part of the stage anyway - but I do agree they are the lamer ones.