First off the entire concept of "tier discussion" is just a garden for ******** discussion to flourish. 99% of you have absolutely no clue what you are talking about and even less can convey that point intelligently. If you haven't played brawl IN DEPTH what you see or what you think is likely mistaken most of the time. So what you have is a bunch of wrong ideas and miscommunicated opinions floating around, trying to take a stab at what the tiers will be. The only thing anyone can be certain of at this point is that the game is more balanced, making tiers far less significant.
Posts like this "sound" ingelligent but this guy has no clue. First of all Yoshi was not significantly nerfed, he was significantly buffed. Yoshi has 3 "gimp" arials and 2 with knockback. Neutral air has good knockback, not amazing, but good, definitely enough to kill with at a reasonable percentage. His Up Air always has been, and is still great for KO'ing, very few characters have better. Yoshi is effective anywhere on the stage, if you can only play him near the ledge you clearly do not understand this character, why are you taking the time to even post about him?
#2-4 has far too much wrong with it. It's true, he can't jump out of shield and I can see this being a slight hindrance but a good player knows how to block effectively and the mechanic doesn't matter in the end. Attacking with DJC was an offensive abuse of a defensive mechanic, players would get struck after and cry because they killed their only means of recovering in Melee. But this isn't Melee, you can still Double Jump attack, you just go up instead of down. Different does not equal lesser.
I have to give you props for at least trying in a decent manner but too much of what you're saying simply isn't true. If you truly have played the game "a lot" you haven't played Yoshi much "at all" and if you don't put forth the effort to be amazing with the character you aren't going to properly see if the character if flawed or your gameplay with the character is.
Then posts like this are just sad because people actually believe it. Just because you repost the uninformed opinions of others doesn't make it hold any more truth to it. Yoshi is NOT God tier, nor is he bottom tier, but guess what? So is EVERYONE else right now. No character is standing out as amazing at the moment. Yoshi is balanced, as he should be. I have yet to see a single flame against him that isn't either from someone uninformed or from someone who just plain sucks with the character.
The one and only person I know of who has actually played brawl decently as Yoshi and against other HUMAN players who also know what they're doing is me, and I win my fights. Until we are all on Wi-Fi don't take anyone's opinion too seriously, myself included.