They lost two D1 linebackers, but return about 7 starters on D, 8 if you count one of the linebackers who started for one of the D1 kids who missed about 5 games. Other returning LB is a two yr. varsity starter who led team in tackles last year - by alot. D-Line returns 3 starters or I should say four if one kid plays both ways. DBs aren't young - three of four are returning starters (2 Sr. safeties, 1 Jr. DB).
Most of the offensive production is back minus 3 yr. starting QB who didn't have his best season last year - but didn't get a lot protection. Two very good RBs and best wide receiver is back, also stud TE. QB position will be better then people think - both guys are very good athletes and have some wheels. O-Line should be improved. Interesting to see if anyone plays both ways - not typically what they do.
7 on 7 has gone better than expected IMO. Some guys missing here and there, Couple guys need to get healthy. One real bad performance that I saw vs. Aurora Christian where the team all looked like they were sleepwalking.
I do not think they are less athletic than previous years. Not a ton of speed on the outside. Depth may be an issue.