The problem with moving people around (like Freeman to LB, or Marshall to AB) is that there has to be someone who can do the job better than them. For the past few years, we all knew Gotsis was a better SDE than DT because every time he lined up there he was wrecking the offensive backfield. Unfortunately, he was also our best DT so we didn't have the luxury of moving him around as much as we should have. Freeman had a "down" year compared to his freshmen season, but if no one could beat him out, do you really want them there?
You can question our recruiting, but I'm sure the coaches who see the players every day in practice know who should and should not be playing and where guys should be playing. Coaches are going to play the best 11. Also, like the case with Lynn Griffin, the players have to want to play where the coaches move them. CPJ said he's wanted to move Griffin to AB for years now, but Griffin wanted to stay at DB. It took the unfortunate string of injuries for Griffin to finally move there, but he's probably going to be a big factor at AB going forward.