I've heard The Who bootlegs that sound a lot worse than what this cover band did.
Yes, he's hilarious and OTT, but I'm sure also the main reason why the audience was watching this band at all. A little excess is nice.
And as for Keith Moon: He was a character and a star, also a troubled soul and I actually liked his drumming, but three things he was not: a technically adept (in comparison to many of his peers), solid or tasteful drummer. May I quote JAE: "Do I miss Keith Moon?! I miss him everyday as a person! Not as a drummer. It was difficult with his style to hold the rhythm down live, I'm much tighter with Kenny."
Now of course JAE might not have had a better idea of what was good for The Who (in my opion, Keith was, they were much more boring after his death) than I or anyone of you. But Keith Moon was evidence that you can be OTT on your instrument, defy convention and do the same lengthy 16th-based drum fill/tom run live over and over (at varying speeds!
), yet still contribute to the greatness of a band. However, saying that he was the member of a tight rhythm section, a nuanced player, intricate technician and "less is more"-groover is misrepresenting him. That is like saying Vincent Price cultivated sparse method acting.