For the love of puppies, this has got to stop!Because it is more balanced. Characters that were bad in Melee have been buffed some. Characters that were exceptionally strong in Melee have been nerfed some.
I can't even count how many people have said "Some really good chars in Melee were nerfed and some really bad ones were buffed!" as a sign of Brawl being more balanced than Melee.
When we say "A game is balanced/unbalanced", we're talking about it in relative forms. Are the characters in the game we're talking about balanced when you compare them to each other?
So what if the game's been re-balanced from Melee? So what if most of the Tops and Highs have been nerfed at different degrees while the Bottoms and Lows and Mids have been buffed (and sometimes even nerfed)? That's re-balancing the game. The balance has changed, yeah.
But that does not automatically make it more balanced than Melee or even balanced in general. The tierlist has just changed. Using the same logic as you and others have used, if every single Top and Higher Tier in Melee were nerfed to Bottom Tier in Brawl and the Bottoms and Highs were nerfed to Top and High, it'd still be more balanced, even if the gap between Top and High is immense and no one below High can even come close to beating the Tops and Highs.
The game has been re-balanced (which is only logical). The question that remains is whether it's actually balanced. Don't compare the Brawl characters to their Melee counterparts, compare them to the other characters in Brawl.