I absolutely love this tactic, but like the last few posters, I got frustrated with the AMC.
Try changing him to a Trequarista - but keep all the PIs that you can.
Should be: shoot less, mark tighter, more direct passes. Plus those the trequarista already has set.
The team hasn't suffered at all, keeps the same shape, the only thing is he seems to make runs beyond the strikers with this role which he didn't seem to do before, and has a bit more freedom to be creative.
Still doesn't set the world alight ratings-wise like a good WB will, but if you have the right player for the role, I have found he averages solidly 7+
big ups to Gob Bluth for the original tactic
it's funny how the AMC in the original tactic gets so poor ratings, and I was sure it could be improved because whenever I went down to 10 and took off my AMC, it seemed to make no difference to how the team played...