I never had a problem with the goofball acts. I was a big fan of this show when Howard Stern was one of the judges (very smart and completely professional; not like his radio persona at all), and ridiculous acts were rife then. But there were also an amazing variety of genuinely good acts, everything from street painting to martial arts to bicycle acrobatics to archery. Then a combination of three things… the obnoxious buzzers which the judges weaponized to a degree that makes Lego Masters’ “twists” seem tame in comparison, mass-destruction formats that ensured that only a very few types of acts had a chance (Elite was robbed, dammit), and the sixteenth-witted peanut gallery that howled BUUHEEHHEUEUEUWWW at everything that didn’t wow them in the first two seconds… chased out nearly all the unusual or creative contestants, leaving a largely homogenous mush in the finale. Last season there were three rappers. Three!
Personally, I think the show would be vastly improved if the entire audition round took place with no audience, or just the NBC crew, and no buzzers. Everyone could do their acts in their entirety, and if it was awful, the judges could say so quietly without two minutes of grandstanding, and that would be the end of that. Look, I’m aware that “cringe” mania has grown to such an absurdly astronomical degree that one less-than-professional song on YouTube that a random girl did as a birthday present can spark a national outrage, but these people have come a long way and are making an honest effort. However inept they are, I really don’t think giving them four uninterrupted minutes once in their lifetimes is too much to ask. Heck, I’ve seen Shark Tank entrepreneurs who deserved far less. Sometimes a bad act can be funny, or amusing, or interesting, or just an opportunity to poke fun at some goof on TV, and it’s a much smaller waste of time than listening to a bunch of children in the audience howl and the judges needing 200 words to say “no”.
I remember Ssaulabi (called the Taekwondo Demonstration Team or something stateside; very impressive), Lea Kyle (gorgeous, probably not a full-length Vegas act but deserves plenty of success in life), and Lightwire (gorgeous, completely robbed but I’m used to that by now 
). Singers were great but run together after a while. Never liked any of the comedians (I thought even Josh Blue was passable at best).
Be covering the season 21 finale at the usual place, of course. Not expecting much, but as long as they don’t ramrod another Ben Lapidus through, I won’t complain. Too much.