Honestly, here's the thing that PCL understands, that the general population doesn't.
The game changes, and if the players don't adjust to it then we will have a bad format.
They have provided us with the cards to counter what is popular. For example, UNTIL WORLDS, we never saw a deck like Blissey/Cessation/Beach or Toxicroak/Scizor hit the main stream. It takes a little creativity, but it proved to be successful. The result was a stale metagame where Plox dominated, because too few people actually wanted to counter the deck even though it was proven that it could be done effectively. Instead, we had about 3+ months of constant bickering about how broken Gardy/Gallade were.
This year, SP decks are taking over. Rather than adjusting, we are complaining, once again. Yes, they are over powered, yes power spray is broken. BUT, why don't we look back at some of the older cards and adjust just like the top Worlds players did last year? Pachirisu to help setup and stop Energy Gain abuse, Chatot to help recover from Mesprit lock and failed Uxie drops, Alakazam to stop opposing Luxray drops/other powers, Dusknoir to control the bench, Vire X to eliminate stadium and Tool abuse, Volkners as an alternate source of draw power, Cynthias for comeback power, Furrett for search power without using Poke-Powers etc.
These are just some of the older cards that have been forgotten. I don't know how many Spray'd Uxies and Claydols it's gonna take some people to realize that maybe their old setup system just isn't going to work as efficiently anymore and they need to think outside of the box.
Setup decks are just as viable as SP decks, you just have to think outside of the box.