I think Wario's grossness might have come as an extension to his stereotypical 'manliness' mixed up with his tendency to being humilliated. I don't mind it as an aspect of him at all, but I think it comes out better when it's used like in Shake It, where picking his nose or scratching his butt were more idle habits than anything so it gave the impression he didn't care about the deeper implications of his adventure.
idk as much as it has a reason behind it in japanese manuals and what not, it's a dumb justification given it could be there without getting in the way of his more important traits. Wario in smash never felt like Wario to me; the character doesn't have the moves, the sense of humour or even the general... feel, of what Wario actually is.
You do realize it's actually one of, if not his main trait? It's not just "reasons in japanese manuals", it's a huge part of his character(in Japan). Heck, Brawl's translated Trophy had it mentioned as being as important as his greed(which unlike Grossness is hard to really represent in a moveset):
Brawl: Mario's self-styled rival. He loves money and gross humor.
Likewise, Money(Greed) and grossness are emphasized in 4 as well:
A living embodiment of gross, this villain hates Mario and loves money.
It's like if you didn't represent Donald Duck's anger in a fighting game because some country decided his anger was way to disturbing so now it isn't a major part of his character.
We in the west have long been living with a censored Wario, but now that his traits that's always been there in Japan are starting to become obvious because more time is spent on his actual character these days.
Heck, even the greed thing thing wasn't really THAT much of a thing in Japan, though the Ego was:
http://www.sourcegaming.info/2015/08/11/wariofart1/
http://www.sourcegaming.info/2015/08/11/wariofart2/
American Wario was made much more of a villainous character that was more seriously evil, while the japanese version was always a goofy cartoon villain.
-Doesn't have the moves :
Which moves exactly, if we take Brawl Wario? The Power Throw? Cause that's the ONLY arguable signature move Brawl Wario didn't have.
He also had a lot ofhis moveset(even the A-moves, which for many characters is somewhat unrelated to their games/character.
-The Feel: Feelings are vague and very subjective, but HOW doesn't he feel like Wario? Again, his moveset is one of truest to the character of ANY in Smash(though outclassed by Mega Man- that guy has the single most true to his roots moveset of all). He's fast, strong and heavy without being all that laggy(unique traits and also ones that I feel fit Wario).
It really does feel sometimes that Land fans dislike the fact that Wario was based on more than just that series, in how his specials are all from World(Land in 3D!) and Ware. Brawl Wario had both the Ground Pound and the Shoulder Charge.