So they're sacking those below him but not him? Seems odd. Cut the head off if you've decided to get rid.
Not necessarily a bad thing. Lambert has done some good things but the playing style has been variable at best.
Arguably the coaches are the people responsible for delivering Lambert's vision here so they should be held partly responsible.
Add in the stories of other mistakes and then I can see why their heads are considered above the parapet and Lambert escapes (for the time being).
Equally I can also see that this is a cheap way of undermining Lambert's authority but I'd prefer to concentrate on the positives.