There's so many factors. Right now, no one can clear hazards because of gholdengo without great tusk. That's one thing. Secondly, no teleport on most defensive mons outside of slowking(who dies to all the dark types). Passive teams really struggle with annihilape and iron valiant as well. A lot weren't running psyshock but now they all are so clodsire can't wall it anymore. People adopted chi-yu with choice specs which clodsire can't wall anymore. Dragonite is difficult to wall without dondonzo. iron hands is difficult to wall without amoongus. The fact that all the defensive mons lost toxic outside of the poisons ones and scald was taken away. Plus almost everything is pretty offensively powerful.Could it be possible that Cyclizar is one of the factors keeping people from using passive mons in higher parts of the ladder?
So if you want to actually change the metagame, you'd have to go down the list and just start banning everything. But gholdengo would change things. Even with doing all of that, stall mons like blissey are never going to be as good as they were because of no teleport, less pp on softboiled, and no toxic. So walling stuff is just more difficult in general right now than in past gens.