This is a good point. There were always whispers that he was a bit of a dog (not a dawg) but maybe he just doesn’t have the fire that some guys have (like Diggs, who maybe has too much of it). To be fair none of the QBs Cooper played with were strong alphas except maybe Dak, but Dak has not been able to overcome the dysfunction of that franchise. Maybe Cooper will do better on a team with a real leader at QB where he can just go ball.
Back to Diggs, reading between all of the lines, I suspect he would let Allen have it whenever Allen ran a play as called but not featuring Diggs, and it got into Allen’s head and hindered his ability to play within structure. It became toxic on the field. I don’t think he’ll have that issue with Cooper unless he gets fixated on his contract year target share but again, the kind of moping he’s known for is 1/1000 of what Diggs would get up to and I think they can handle it.