oooh chelsea, i really didnt expect that, not sure why lol.
ok tone his closing down slider down quite dramtically. this will stop him chasing unnecassrily in the oppositions half, from memory his pace isnt that great so he will be flogging himslef to get to the ball. besides essien will be much more effective at this job.
if you want to keep that formation to keep a tight shape in big games then thats cool. but may i suggest moving him to AMC and plonk essien as a CM or DM to patrol around and clean up any mess. (up to you, i personally dont like and AMC DMC 'diamond' shape as it leaves a big central hole. i much prefer a CM and an AMC) You seem to have have a very good back 4 and of course a great GK, so adopting a slightly less defensive midfield formation shouldnt be too much of a problem.
give it go for 4-5 matches, this will allow your players to adjust to the style of play slightly and see what happnes.
IMPORTANT. if you do move to an AMC-CM combo then dont have essien closing down over the whole pitch as good teams will pass it around until he is pulled out of position, then spring their attack.
hope this works!