love this system ; )
I'm currently playing with ajax but with a dmc instead of an amc because i want my wingbacks to join in on the offence.
also my wingers are in the real FL and FR positions, no arrows. It's really working out for me, my wingers never seem to get marked at a cross : ).
havent been able to get my central defenders to join in on the attack not with arrows, mentality or anything else so i'll give you're method a try. I'd really like to see maduro play a libero ( koeman scored 1 every 2 matches as a central defender ) kind of role.
all in all i'm gonna give you're system a try. i might just use 3 upfront with no arrows but i'll definitly give the midfield system a try.