Just watching the videos my take is:
Corners look solid!
LBs and DL look good
Omar looks like a freak if he can stay healthy. He's all legs and arms with some good hands, an NFL type body. I'm still suspect about the rest of the receiving Corp, but I'm glad we have some height now.
RBs look pretty meh, but a lot of guys are out
Martinez is clearly number one. His throws look very tight and on the money. Smoothers has some work to do if he wants to win the 2 spot.
Oline looks big, but they need to work on changing their body comp over the summer. Lot of potential here if they can pack on some more muscle over the next few months. Technique looks a lot better than last year (but it's just drills).