Kamara spoke about it in his interview unprovoked. The vibe I'm getting is that Allen enjoys veteran teams because he likes those guys to control the lockerroom while he focuses on X's and O's. He appears to not have personal relationships w/ guys, other than perhaps bottom line hey gotta cut ya, type moments. This may be what Amy Trask was alluding to when she mentioned his "leadership style".
He's just not very personable and we're right back where we were last year, the players can't focus on playing because they have to be worried about making sure the guy next to him does his job.