I feel like Jarron is the type of player who when you're not counting on (last year, relying on Nix/Tuitt for every-down plays), he's such a physical freak that he'll stand out once in a while when you're not looking for it, like the examples you mentioned. But this year he's going to be expected to get penetration everydown. We'll be watching and depending on him constantly, rather than just be glad he made a play once in a while while Nix/Tuitt handled the grunt of the work. I hope you're right, but I'm still very skeptical of him.
Physically, I just didn't see Rochelle as being ready. As a true frosh, that's expected. But I can't remember a time where he showed a sign of being physically ready - blowing by his guy with speed, bull rushing/over powering. Again, expected, and he'll be really good in time, but IDK if that time was now (hopefully he's had a killer off season, With Longo's program, I have no doubt).