It might be the fact that it looks like they used someone's desktop background photo for the clouds and sky.
Speaking of skies, Neo Aquatic Ruin seems to be set somewhere off the coast of LA where there's lots of air traffic. Maybe I would have Splash Hill's sky as my desktop BG for a couple of days...but I'd
never put the contrail-infested cheap evening sky photo featured in ep. 2 there. I'll say it again: episode 1
at least tried. From what I can gather, this won't be getting half as much effort due to it being lol 3D and therefore "better" by default. So it might end up looking decent in the end (because most of their effort for ep. 1 was misguided anyway). ...looking at the generic 3D brick & bush & pipe assets they've got so far tho', the chances for that seem grim.
I'm am not saying ep. 1 looked good by any long shot. But to declare this as looking
so much better is deluded and there's no way I'm buying into this crap; its apparent strong point is
not looking both cardboard-2D and ugly at the same time; not much of an improvement there, just ludicrously low standards.
As for the pine tree BG layer, I'm refraining from passing judgment until I am 100% sure the levels that feature it aren't all parts of a bigger Floating Island Zone or whatever. With the Tornado fly-in entrance and supposed battle with Metal Sonic at the end, that could still be the case.