I still wouldn't put him in the "great" running back category, but it depends on your definition. IMO, Ameer Abdullah was great. Ahman Green was great.Lucky was a great running back and pass catcher out of the back field. He was just built up to be Reggie Bush out of high school.No.
Case in point - Marlon Lucky was a 1,000 yard rusher.
But, you're spot on about the other part - his biggest downfall is something he had no control over. He was a five star back with incredible expectations planted on his shoulders. Had he been a three or four star back, I think history would remember him in a slightly more favorable light.