I think there is a serious argument to be made that Moyes is not the best man for the job- but the cost of a managerial change at this point is entirely preventative. Moyes is due another 10 millions pounds on his contract right? So sacking him will be expensive. Furthermore any manager brought it will not be able to remodel the team as no money will be made availiable. Everton, to use the overused phrase, have been punching above there weight for the past 5 or so years and now we seem to be slipping down the table the past two years- This is not an attractive situation for a manager a team with relatively high expectations and few resources to meet them with. The cost of Moyes' contract termination aside I dont think we could even entice Owen Coyle to come here let alone a proven world class manager. I think Everton are married to Moyes at this point- for better or for worse.
Moyes has won with Everton before and with the players he has now and he has won playing Cahill up top before. I am in know way trying to defend his tactics but Moyes did not become tactically negative this season- he always has been and Everton have won despite it. In moyes we trust- anyone who says that is a fool. But sacking him wont solve the problem it will compound it.