Every year is different ... different team, different personalities, different alpha dogs ... this year's team had all of the talent in the world but lacked cohesiveness. Why not do something to bring this group of extremely talented individuals together? What if Miles truly lacked that ability but sought out a resource to supplement a personal weakness - is that not a positive sign?
No one is blaming everything on the AD. And I am even OK with his "ruling" that only use consultants he's approved. You just don't do that mid-season unless TM ignored him in the first place.
The AD's first job is to provide all of the resources possible for the coach to succeed.
Also one real specific point ... the consultant was NOT brought in mid-season, he was there from the start of the season. What the AD did is undermine Miles mid-season. That is wrong!