It looks like it reuses a lot of stuff from smash 4, but much more flashy. not gonna lie it feels like a super modded version of smash 4, but i am too hype. I'm guessing since it is still in development they're gonna get a new voice actor for the menu dude? that would kill my hype a bit if they re use stuff to THAT point in the final game...
Switch while a jump from the Wii U isn't a huge enough jump to justify completely new models. Would be a huge waste to make slightly different models when they can reuse/change around assets and cut down development time.
This looks exactly how I thought it would. Pretty much uses Smash 4 as a base and builds/changes on top of that with new & returning stuff. Overall pretty much a new game, but not something 100% different which is still fine.
New lighting system and style looks a bit weird but definitely not bad I like the new particle effects.