Board Thread:WARNING ALL USERS False Info\Spoilers/@comment-68.204.189.179-20140113020418/@comment-24178824-20140113055706

While the official explanation does have some holes, it actually holds up pretty well.

Reasons why some characters might not want to fully shift.

Kali, she seems to prefer retaining her martial arts, she never even went full "beta form".

Ethan and Aiden, they don't really need it, since they've got twin fusion.

Derek, he probably wants to distance himself from Peter, plus he's usually pretty in control.

Ennis, he...has no real excuse, he's a big brute of a man, and it would seem to be right up his alley to go full "beast from", so your guess is ss good as mine.

In short they're are no hard facts only assumptions, but with Scott being an alpha now, hopefully we'll get some answers soon, who knows maybe it'll all make sense.