First and foremost, thanks for the prompt update, especially since I wasn't even aware that there was supposed to be another mid-month update until about two or three days ago. All that really changes is that PU's devastation came fifteen days earlier than expected though.
...Despite my initial incredulous reaction to this and my initial thought from over a month ago being that Regieleki would be bad for UU if it dropped, it might well be fine just because Ground-types or a mon with Volt Absorb are already on most UU teams and Grimmsnarl, Klefki, and the Aurora Veil-bot that is Ninetales-Alola seem like they already do Screens better. Add in the fact that Pincurchin is several magnitudes worse than Tapu Koko and...yeah, this may be fine. Either way, I know that I prefer this dropping to an Urshifu-form. Please keep that abomination of bad design away from us, OU.
That said, I still can't get over its Speed though even more than a month later. Being able to outspeed +1 Speed Jolly Blaziken with 0 Speed EVs is rather absurd if welcome given Blaziken is still here--grumble grumble.
Yeah, sorry about that. I barely touch Slowking, but it was basically inevitable it would rise back given that Slowbro got taken back by OU and Teleport + Future Sight is a stupid good combination even before Regenerator's additional stupidity, especially with a bunch of strong & fast Fighting types in the tier even after Zapdos-Galar got rightfully banned. RU probably is not getting Slowking back anytime soon unless maybe Slowbro somehow drops back to UU by next month.