Brawl is looking even worse as time goes on. I'm one of those few people that could accept what Brawl was, flaws and all, even while playing Melee. People left it for varied reasons. Most will go to the scapegoat of tripping, but whatever nobody liked it. Others, like me, just don't want to deal with Meta Knight anymore. I stopped watching tourneys, because the top 8 where filled with MKs. Everything about him just dragged people down. So much that nobody complains about him in 4 because they feel he deserves it, almost nobody even plays him. Also Smash 4's balance is another reason. You can pick up a character and roll with them and at least get results.
I mean it is sad to see Brawl go because it's ATs are the most amazing things in a Smash game. Maybe some day it could come back ( with the shiny new rule of Meta Knight being banned). Also Wolf. He doesn't deserve to stay on Brawl.