First off, I want to say that I understand that you all are disappointed and why.
Someone earlier commented that they revealed who the new characters were too quickly. I would have to agree with that statement. Can you imagine what we would all be thinking if NOW we found out sonic was in? People would be flipping out! And what if right now we found out PT, Dedede, Diddy, and Olimar were in? No one would be talking about how disppointing the roster was, but rather how awesome it was. See, if it had happened like that, then we would have suddenly gained about 6-8 new, awesome, characters all at once. As it stands, most of them are already revealed so instead we gain only about 3 new revelations upon release.
Something that has been said a lot that I'm going to disagree with is that "no effort was put into the game." Out of all the games I've seen in my life I'd say this one has had some of the MOST effort put into it. If you've been checking the dojo constantly (and I'm sure you have) and you've read those interviews with Sakurai (which I'm sure you have) then you'd realize that this game has had a TON of time and energy put into it. They've taken time to revamp the entire game, they've added some new techniques, a ton of customization and options, and a myriad of other things I don't have time to list.
It wasn't that development team was lazy; I mean, they had more people working on it than most games even dream of having. And not only that, but these people were chose specifically to work on this game, and were specialized in their field. Once the game is done, the development team will split up. The kind of effort put into Brawl just doesn't happen with any game; in fact, I wonder whether it's even happened before in game development history, and whether it will ever happen again.
So it really has everything to do with poor decisions on 1. How much info about Brawl (especially characters) to show the fans, and 2. When to release this info. I think there's a good chance that 80% of us would be satisfied has we not known anything about the roster until today, the day Brawl was released. In fact, I think if we had found out everything now everyone would be ecstatic.
Personally, I was only shortly disappointed, and now I'm just looking forward to having it in my home. I'm content with the game.
And for those that are still feeling let down: don't forget! We still have a lot of new advanced techniques to discover.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
And I mean that seriously. I'm sure there will be new ones in Brawl just like there were ones in Melee.