I feel like a lot of detractors of Wario's portrayal in WarioWare/Smash base their belief off the idea that Wario's always been 100% macho... which isn't really the case when you look at how Japan-specific material plays it up. Even pre-Ware, Wario's been seen picking his nose a lot more than even I expected.
I think this stems from WarioWare not showing Wario in-action nearly as much as the Land series or Mario spinoffs - The gross elements are more pronounced since Wario isn't getting into as many situations where he can show his "macho" traits. I get not liking this approach in terms of both Ware and Smash, but saying WarioWare Wario is an entirely different character than Wario Land Wario is a bit of an exaggeration.
As for Luigi, I don't get how the Poltergust is really hampering his character. Sure, he uses it for a grab and Final Smash in the Smash games, as well as a few times in spinoff material, but it's not really as defining to his character. Heck, he's been portrayed as cowardly pre-Mansion in things like the Super Show (which isn't canon, I'm aware, but as long as we're citing Mama Luigi...), so I don't see how him getting a relatively scarcely used weapon changes anything, and I don't really get how he was the "cooler" Mario at any point.
I really like Ivander's interpretation of the movie's take on Luigi:
This is something I feel is a concept that can be applied to Luigi across the whole series.