My good ol theory of the tier list, whilst knowing the SBR won't think the same, because they probably still over rate characters like Falco and Game and Watch, whilst the former has definitely certified himself to have HARD COUNTERS. And the former not really exceeding against any of the high/top tiers at all, losing strongly to both Marth and Snake.
Diddy and Wario are on the rise, and Marth is their achilles heel.
Anyway, continuining the theory, I aim to think of it as a "trio" of top tier, in melee this was Fox, Marth and Sheik. Sheik beating Marth, Fox beating Sheik, and well Fox being a slight cut above the rest. To relate this to brawl, these characters are Meta Knight, Snake and Dedede. Dedede being the 'sheikish' character, making so many unviable, but actually having several hard match ups across the character roster.
I order the high tiers from what I gather are their round about match ups, or significance in the metagame.
If the point system was to be used like last time, Snake will definitely increase his points. Hes increased any 'previous' REAL disadvantage on him to 50:50 at LEAST (minus Dedede), and continues to stride fourth, making his match ups more and more in his favour as times goes on. He's becoming as big of a threat as Meta Knight.
Without further ado (order of characters in individual tiers are arbitrary)
Tier 1 [****ing AWESOME]
Meta Knight (durr)
Tier 2 [No 'hard' match ups]
Snake
Dedede (D3 Is the obvious exception here, but due to my theorising of the trio theory, his still ever present tournament dominance, and in my opinion only really having FALCO now to really worry about, he is number 3...)
Tier 3 [One "bad" match up]
Wario
Diddy Kong
Marth
Both Wario and Diddy lose to Marth, but Marth loses to Meta Knight (but it seems to be getting better). Potentially over coming his weakness of D3, and Snake PROBABLY getting worse. If it wasn't for Marth's advantages on just about all the other high tiers in his tier and below him, he wouldn't be as significant here
Tier 4 [Minor-Semi Significant disadvantages)
Pikachu
Ice Climbers
Falco
Game and Watch
Tier 5 [Semi+ disadvantages, strong match ups]
Lucario
ROB
Olimar
...?
This is probably the most debatable tiers (even for me to discern).
1. Falco has been hit hard, he SHOULDN'T BE top 5 anymore with definite hard counters from ICs, most likely Pikachu, and worsening match ups against Wario , Snake, Diddy Kong, Olimar, and possibly Marth. However Falco's "dominance" is akin to Dedede, and boasts evenish match ups still with Snake and MK, and being Dedede's MAJOR weakness in the current metagame.
2. Game and Watch, whilst being outrageously good 'bases', literally destroying most of the tiers below him, suffers having no real advantages on anyone above him; having slight controls over ICs, Pika, Falco and some others.
3. With Pikachu becoming a major concern for MANY characters, including Falco, an increasing advantage on Dedede, Snake, Meta Knight and many others, he would be in a tier above if it weren't for Marth, and MK still restricting him.
4. Ice Climbers have proven to be a power house, arguablly only having a real weakness against Diddy Kong and Snake. And boosting probably a close to even match up with MK, whilst perhaps being the most 'technical' and exhaustive character in Brawl, Nana and Popo are amazing, and their infinites are down right GAME BREAKING. Top it off with how significantly 'unstoppable' their desynching moves can be, only characters with strong defensive projectiles/mobility can argue not being even or disadvantaged against ICs. Also accounting ICs being Falco's hardest match up.
Tier 6 [Arguably viable for solo]
Pit
Peach
Kirby
Zero Suit Samus
Toon Link
And from there I can say all below are mostly unviable: i.e. low/mid'ish' tier.
Sonic, Pokemon Trainer, Luigi, Sheik/Zelda and Wolf are probably the next cut above the remaining characters.