You will never master Street Fighter without this
In tournaments and stuff, you never see serious Street Fighter players with a regular controller. They alsways have a fightstick. It makes it easier to master the game, and is a good acessory for any fighter, including Smash Bros..
When Smash Bros. was announced for the Wii U, an important question rose. How will GCN controllers work with it. Most people I know prefer to Brawl with the Gamecube controller. The Wii U doesn't support them, so it will b a hard transition for those who are used to it.
A dedicated fightstick would be a good idea because longtime Brawlers wouldn't have to adapt to the WIi U controller, and it would make the controls more flexible. The stick would be easier for anyone to use because it, well you know, lays the buttons in front of you. It would also befefit because people will start to ee Smash Bros. as more of a serious fighter. I think that it is a good idea.