I disagree on that, if the situation is that the coach coaches the players provided, then the coach has to be totally on board.
It needs to be understood from day one. To me it's the ambiguity of the situation which has been the main problem with the last 2 coaches.
If you look at the transfer business done in January, Eustace got covered more or less the positions everyone was calling out for. It isn't the "what" he got, it's the "who" he got which seems to be the problem.
I'm not saying it's the right way to go, but if that's how it is then all parties need to be on board or it definitely won't work. I can't say it's how I'd be thinking, but I'm sure there are many examples of clubs where it works successfully.