Goalkeepers ratings are nearly always low!, unless he has alot to do like lots of savea, saving a pen, etc, so dont bother looking at his stats!, as for your DMC, try resting him a few games then play him again!, are you manualy putting his skill points on?, if so depending on the arrows your using on him will depend on where to place the points, i.e, if you have him set with blues then only use skill points on defence and physical, if you have reds on him then attack and physical, as for your MC try switching MC positions this can have a great effect as players play better in certain positions!, the way to try to avoid having to find out the hard way is to aleays check what foot they play with then put then in the corresponding position.