While I do agree with you on most points I don't think Wario is meant to be completely serious. While Sakurai thinks Wario should be wacky I don't think that's right either. Wario is meant to be a bit silly but mainly through what he gets himself into which the transformations highlight.
Yes, of course, he's not a serious character, but the thing is, the silly parts of the games didn't come from Wario being "weird" or something.
Like,... what I mean is, the transformations are very wacky and cartoony, but those are things happening TO Wario. Like, Zombie Wario could be seen as gross, but that's not part of his character.
Or if you look at the bosses in WL4, those look really creepy, freaky or gross, but it has nothing to do with Wario's character.
It makes no sense to attribute those weird, crude or creepy parts to Wario himself.
The same thing could be said about the crude humor Wario Ware. If you look at the first game, the nose picking minigame was Mona's and the toilet stage was Crygor's. Wario's storyline and microgames were mainly about getting money and treasure.
Wario's personality was always very straight forward. He loves money, he loves himself, he'll do whatever needs to be done to get what he wants and he's not gonna let anything get in his way.
When he DOES do crude things then it's because he doesn't care what people think of him, not because he loves to do crude things.
Like, when he picks his nose in the intro of WWinc. he just doesn't give a
.
Everyone picks their nose sometimes.
But when he's literally talking about his shit in some promotional interview that just feels really forced and out of character. Why would Wario care about shit?
Again, it just feels like someone was desperately trying to be shocking in order to be funny.
That's what the Wario Waft feels like. Like they put it in only to be funny, not because it's actually something Wario should have.
And it's always the same joke. Fat people are gross. Hardy har har. I'm just so sick of it.