For the first question, it would definitely be a drastic change from what the staff has been saying and doing since they arrived to build a team and be a leader of men.
Obviously we don't see behind closed doors but how McD has been praised for how the treats his players makes me doubt it.
For the second, absolutely they could be. But again, this doesn't seem like the type of situation that they would want lingering on so the meeting they had this morning before diggs left could have been a sour meeting from both sides.