From my armchair:
Tebow has the potential to be a great QB. His undeniable charisma positions him to be a real leader, something the Broncos have lacked since Elway retired.
Denver needs to get some beef on the offensive line. It's hard (especially for someone that is just getting their feet wet) to make good decisions, good passes, etcetera, while running for their life EVERY FRICKEN PLAY.
Get some credible running backs, and teach your receivers to block. If you have no running game, then your opponents only need to defend the pass.
A defense that allows 7 yards a play is not helping. The only bright spot in the defense at the moment is a rookie. The line can't get any pressure on the opposing QB, and the secondary is letting far too many 15+ yard plays develop.