To me, I don't see Dimma having the same control or say in club administration like many other coaches appear to have. Dimma to me has a specific role outlined for him by the board and he is sticking closely to it. I think as long as he continues to meet their key indicators (ie number of games he puts into the kids etc) he will be retained.
The club is all about preparing the future. Generating funds to pay off debt and finance the football department, recruiting and developing players, trading in youth to compliment the list. Dimma is really a role player himself - player education first, winning games second. That's hard for many to accept or understand. Perhaps he will develop the tactical nouse to continue on with the group as he gain experience himself in the role but at the moment this isn't his strength nor his purpose for that matter.