From The Charlotte Observer's Joseph Person: "Sources say (general manager Dave) Gettleman views Smith as a distraction and is ready to turn the locker room over to emerging stars such as quarterback Cam Newton and middle linebacker Luke Kuechly. Smith's fiery personality has made him a fan favorite, but can grate on teammates and coaches."
The last few years seem to show that teams are increasingly willing to move on from quarterbacks (see Gabbert, Blaine; Weeden, Brandon; Ponder, Christian; etc.) that suck - partially due to the new rookie contracts - and more willing to handsomely reward the ones that aren't elite but well, at least they don't suck (Flacco, Cutler, Ryan, Romo, etc.). We can argue the merits of individual contracts and perceived value of individual players, but at the end of the day, Cam Newton is getting a big fat contract cause he doesn't suck. You don't have to be Manning, Brady, or Brees to get a monster contract. You just have to not be Blaine Gabbert.
Romo will ALWAYS suck, even if he wins everything. He's a cowgirl.