If he keeps with this 4123/4141 setup I'm fine with him staying.
I do worry tho that he will abandon it for 442 again after shelling out huge money on yet another striker.
His excuse all along has been 'look, we lost playing with only 1 striker' but switching to a 1 ST formation sporadically throughout the season like he has proved nothing. Teams, like players, need a run of games to settle. These last 5/6 games we have looked less exposed as the games have gone by and that's due to the formation, not, as some say, leaving Kompany out.