Having a chance to get No Guard Choice Band Machamp without Dynamic Punch is shitty - Conkeldurr and Obstagoon are much better Guts abusers, Machamp most unique set is No Guard Dynamic Punch. I feel like making it Conkeldurr 2.0 is a disservice to the mon, not to mention the chance of what I mentioned happening.
No Thunder Wave in Grimmsnarl is an absolute waste. Prankster mons really need a way to speed control or otherwise screw with the opponent, and Grimmsnarl was one of the best in randoms format. The new Mew set is incredibly inferior to the previous set with Megahorn. Brave Bird hits fighting, grass and bug mons super-effectively, out of those, fighting is already hit super-effectively by Psychic Fangs, and Grass is hit super-effectively by Megahorn, which also has the huge benefit of hitting psychic-types that resist Fangs, much much harder than Crunch does - it also makes Mew significantly easier to wear out, the chance to rise speed with Max Airstream simply isn't worth it.
The fact that Sandaconda still has Body Press to this day annoys me. Multiple people have pointed out that Body Press + Earthquake is shitty coverage - Stone Edge, hell, Rock Tomb stand as more powerful and versatile coverage options.