I think a lot of the resistance is due to people raging that their "prestigious" plat status is now shared with more people. It literally doesn't matter who is in your division after the first two weeks. I for one plan to win my first 2 matches and never play anyone but mid-high plat teams after that, and I could care less what's happening in low plat while I'm doing that
although on another hand, some of the teams they moved up to plat are hilariously underqualified to play against any half decent plat team which is pretty absurd. Thats pretty much my only gripe but its a big one