Allardyce will be supported in the next two transfer windows. As long as their is an upwards trajectory it's ok to keep him. But... if a top class manager becomes available, like say Simeone and we can get him. Then we get rid of Sam. Same goes for players, if a better option than what we have becomes available then you get that player.
We might not be able to attract better players with Allardyce in charge. Perhaps we will need a better manager before we can get the better players.