I don't see what the big deal with the new 3DS is. I have a launch OG 3DS and have no plans to ever replace it. This new one isn't that enticing either. It will have exclusives, sure, but so did the DSi. Very few people cared. If you don't want to cut into your wallet again, simply don't get it. No one's holding you at gunpoint.
As for the Shulk trailer....meh. I don't know anything about Xenoblade, so maybe I just didn't get it. But even despite my ignorance, it wasn't that entertaining. Fairly basic, even minimalist, compared to some of the other trailers. I think the earlier trailers were stronger, for some reason. Everything shown at E3 2014 and after has either some sort of problem with communicating the character's moveset or a lack of entertainment value in the CG department. Mega Man, Rosalina, Little Mac, and Greninja all had hype-worthy trailers packed full of fantastic CGI, good build-up to the reveal, and an ample amount of moveset demonstration. That's just my opinion, though, and it's not like all pre-E3 trailers were amazing, either. Wii Fit Trainer's is the worst so far, easily.
To keep the subject on stages, by the way, I'm glad to know Corneria is getting a Final Destination version. I've always liked the background of the stage, but not the layout quite as much.