Very good list despite the game only being out for 7 months. However, I still have my complaints:
Top Tier: Disagree with: Meta Knight and Dedede.
Like many have said, I believe that Meta Knight deserves his own tier due to him forcing some to main new characters just to beat him. While Dedede has a few good things about him, most notably his chaingrab, he has too many bad points to occupy spot number 3:
Biggest target in the game, thus very easy to hit.
Poor character matchups for a top tier.
Does poorly against small, fast targets, (that means Mety, Pikachu, Olimar etc..., all of which are high tier or above.) who can easily escape his chaingrab.
Very easy to juggle due to being the biggest target in the game.
Recovery is very predictable thus easy to gimp. (although Dedede Jump might spike you before he grabs the ledge so be careful)
Overall, although I believe that the bad*** penguin doesen't deserve spot 3, he can still firmly sit in the bottom of top or top of high.
High Tier: Disagree with nobody (although MAYBE DK should move down a bit)
Middle Tier: Disagree with Olimar, Bowser, Toon Link, Ike and Sheik.
Olimar has great character matchups and his tourney results aren't too bad either. He should be moved up to high tier.
While I can see why Toon Link is this low, I feel he should be placed slightly higher up as the only real reason he's that low is because he's neglected in tourneys.
Bowser, LOL, WAYYYYYY too high. While I can accept that Bowser has improved considerably from Melee, that doesen't mean he's that good. His tourney results suck, has very bad character matchups and pretty much sucks in all areas except obviously power.
Ike, again, is wayyyyyy too high except he has an even worse case than Bowser! He's even SLOWER, (both in running and attacking) sucks at jumping and recovery (Bowsers actually not too bad at it for a heavyweight) and to top if all off, has possibly EVEN WORSE character matchups. At least he's below Bowser, otherwise I would really question this list.
Sheik is an unfortunate recipiant of The Nerf Bat (tm) and as such, her comboing ability is greatly reduced due to the removed hitsun and other problems. However, her biggest problem is her bad matchups against the high tiers.
Low Tier (oh boy): Disagree with Lucas, Ness, Mario, Yoshi and Sonic
Lucas in Low Tier?! Are you mad?! He'sboth powerful and fast, and has great recovery to boot. Promotion please.
Ness is like Lucas, only slightly less powerful attacks for a lot more attack speed. He still has powerful throws and all the things that made Lucas good as well, so one question: Why is he below Lucas?
Mario may have been nerfed, but not by that much. I'm assuming what keeps him from Middle Tier are his bad matchups. Mario is still good at comboing and killing and he can gimp recoveries pretty easily as well. Low Middle Tier, at least.
Yoshi has a lot of great stuff going for him. He's good against some of the top tiers, has good aerials and can recover from far away thanks to his second jump, (although I wish the Egg Toss was better for recovery) but I think he's kept low because of his bad tourney results.
Finally, Sonic. Although he has bad priority and isn't AS good at killing stuff than most of the cast,Sonic is still better than Bowser at least. He has a good matchup against Dedede, has very fast attacks and can be very unpredictable. However, bad tourney results hinder him.
And that's my rant done. Other than the points that I've mentioned, this list is very good.