I generally agree with this. I decided to be generous and give them OL mainly because I was more impressed with Hinzmann down the stretch as their returner than I have been with DJ Campbell as ours (although I obviously watched a lot more DJ and am overly critical of our players) and I truthfully know very little about their other OL. Goosby was more impressive than either of them in his limited stretch now that I'm thinking about it, but it's so hard to project either unit given all the turnover.
At RB, I don't view Wisner as materially better than Donaldson, who I expect to be healthy week 1. I'm not counting Baxter as I don't expect him to contribute at the start of the season and I truly wouldn't care one way or the other if you swapped Gibson and Peoples on our roster, so RB depth washes out for me.
At QB, you're probably right. I'm sky high on Manning and would bet on him as the better player, but they purport to be very high on Sayin. Good point on the extra year in the system. I just have a hard time making any kind of judgment when I haven't seen the other QB play. Fair on the secondary as well, I think I'm so scarred from Downs' performance in the Cotton Bowl that it completely blinds me.
I think Atkinson would be nice depth on our roster, but if you have NC aspirations and he's your feature pass rusher... not great. Overall, I'd be far more concerned about defensive line and LB if I were them than I am about anything on our roster.