Melee is high tier based, but you do occasionally get other people winning tourneys.
Meta Knight still doesn't dominate every tournament, but plenty of people are switching to him because of his dominating stats/character.
Like I said, I give it 2 years until we have a Top4 based game (like Melee) or people finally decide MK is to dominating of the cast.
At least every other high tier has a bad matchup.
I don't care about the other high tiers right now, because they have some bad match-ups and flaws, when MK is the best character in the game by far. So far, he has his own tier.
In time, one of three things will happen.
1) MK will be winning 90% of tourneys with a money prize, and it will become like melee, but 75% MK, 25% other High Tier Characters.
2)MK will be banned or a flaw in MK will be found that changes MK's standings from best character.
3)Nothing will happen, and these discussions will still go on, leaving the Brawl back room to continue putting MK on the top.