>>32233613That sounds like a lot on paper, but take into account that you can barely switch in anymore without taking damage from Covert Cobblestones, Twenty six layers of spikes, and getting poisoned. Plus you have to deal with whatever your opponent chose to do on that turn.
Regenerator really isn't that much, even on physical walls like non-mega-Slowbro and Toxapex. Ho-Oh is really the only thing that can abuse it in tandem with Roost and U-Turn, and it's banned to Ubers in Smogon.