RGIII tore that same knee once before. That makes it tougher to come back from. Another thing with him is his game was based on running as much as it was passing. He was slowed up a bit and teams figured how to better defend the read option. RGIII did a poor job going through progressions and reading defenses last year. That's why he failed. Bradford had no structural damage to the knee outside the tear. It was a clean tear. The recovery technology is so much better and athletes are privy to much better care than average individuals. He will participate in OTAs. He will most likely be full go in camp. It may take a year for him to be fully comfortable, but I think he will be good to go in 2014. If the Rams weren't confident in his health, a QB would have been drafted pretty high in the draft. I can't speak for Long and I wouldn't be surprised to see him miss a game or two.
Also I don't see how he has held the team back.
And I agree with the pessimism with Britt. I'm not expecting much, but I am hopeful. If he lives up to his potential and if he is right physically then we got ourselves something. Problem is he has never lived up to his potential and the knee injury seemed to slow him down.