As far as weather goes, it seems like people are just annoyed at seeing the same thing repeatedly. I can understand that. During round 2, I once saw Shrang's team with toxicroak and virizion being used by FIVE DIFFERENT PEOPLE in the same day. And I see specially defensive mixed tyranitar in just about every match. All Gliscor run the exact same set with the exact same EVs. It gets old really fast.
Wanna know why this is happening? It's simple. People have to win to have a say on the voting. As long as we have suspect testing after suspect testing, people will take the easiest route to victory only so they can amass enough rating to vote on whatever they want to see out of the metagame. As long as we have to vote, the ladder will be filled with "the same teams over and over again".