This is a quality good QB's have, watch the Mannings, Brady or Cutler. They buy time with their feet. It's not all on Trent but he could improve this issue.
the inability to slide and move within the pocket. Watch any of the upper-tier QB's and the first thing you'll notice is they all have pocket presence, the ability to step up or slide in the pocket. It helps to have a great offensive line, which the Bills don't, but I've seen plenty of plays where our line has given Trent enough time yet he still lets the pressure get to him due to his inability to slide in the pocket.