Totally agree on Koeman.
One thing this flags up is how ridiculous it was that you didn't call for Martinez to be fired. That 4-0 derby at Anfield with 37 shots at our goal. What were you thinking?
At that time I think we suffered from, and still do to a certain extent, Moyesitis. A condition where you continue flogging a dead horse and don't know when enough is enough. The Moyes years appear to have conditioned us into thinking a manager is not just for Christmas, it is for life. (Sorry maybe that's a dog). Anyway you know what I mean, we are not a club used to changing managers and we are therefore prepared to give too many chances when the warning signs are there and clear for all to see.
I have to add Man Utd were in a similar situation post Ferguson but they weren't long about getting rid of both Moyes and their Dutch disaster.