Sounds like I use a very similar formation to you. Is yours a wide diamond? I've been very successful with it so far. Bearing in mind I am only level 1 I wouldn't say I have sound advice for you. How did you get on last season? Also, it would be worth checking if you've had more difficult fixtures than against the top two teams.

Remember, we're only 8/9 games into the league so it's still all to play for and positions can change rapidly.