In the middle of a heated game you may find yourself late on the trigger press, causing your chosen player to simply fiddle the ball around rather than make the game-winning shot. In addition, the need to hold a trigger in order to shoot actually makes shooting feel less responsive than it did before.
The game literally tells you to just try waggling the stick around and see what happens.
There are no tutorials or instructional videos on how to use it to your advantage. However, the game doesn't actually tell you how the dribble stick works. Being able to control your dribble at all is obviously a vast improvement. There are both pros and cons to this new control scheme. Normally, this stick would be used to shoot, but now you have to hold a trigger down in order to enter shooting mode before using the stick to shoot. Essentially, you can now control your character's dribble with the right thumbstick. The single biggest gameplay innovation in NBA 2k13 is the new dribble stick. Heck, you might even get a brand new pair of shoes while you are at it. These extras aren't integral to the gameplay, but instead act as shiny diversions that keep you interested in the game long after you have gotten bored with random exhibitions. 2k13 is built on that same great system but throws in a whole bunch of wacky new extras that give the game more of an arcade NBA Jam sort of feel. 2k12 was already an awesome basketball game that felt as if it covered all the bases. Luckily, the NBA 2k series has never been afraid of experimenting with new things, and this particularly holds true with NBA 2k13. The rules of basketball never change, so making basketball games feel different year after year is a bit of a challenge. I've always said that it's hard to innovate in sports genres.