I've noticed that strikers have been under performing this season. I get all my production from my AML/AMR. I have been rotating two strikers with 110% quality and they only seem to score against much weaker opposition. With a 4-1-4-1 you may be relying on your flat 4 midfield to feed the ball to your lone striker. May be asking too much of him, given that strikers seem to be a wee bit nerfed.