Yes we can not drink the kool-aid this offseason, though it gets a lot more potent the closer we get to fall. The disappointment from this last season has me pessimistic for this coming season. However, there really are a lot of changes that there's no way we can gauge whether or not this team will be better or worse. As of now with no basis, I would guess Nebraska wins 6 games next year. While it's not what I'm happy with, it's not enough to fire Rhule.
In one scenario, this OL becomes a top 5 unit in the conference and makes it easy for Colandrea to look like a T-Magic with a better throwing motion and a lot more swag. That same OL unit allows the RB room to rush for 6.0+ ypc (they ran for 5.62 last year). The WRs get a lot more wiggle room on the field now that a QB isn't a lighthouse at UNL. Aurich's defense looks a full 180 from last year's team. DL and LBs are able to finish sacks, gaps are filled, and teams find it tough to consistently throw and run against Nebraska. Nebraska wins some and loses some, but gets 8+ regular season Ws.
In another scenario that isn't a fantasy but worst case, most the transfers are duds. The defense looks completely lost running something new. The offense is so hit and miss, Colandrea gets killed, Kaelin and Lateef look mediocre at best in trying to replace him, OL is a bandaid unit that hardly looks better. Nebraska wins 4-5 games.