Hi Cleon !
I've been trying to do something similar in my replication of Igor Tudor's Marseille. But i just can't seem to get those wide dynamics/rotations as well as you do.
In addition to not crossing as much as I would like, my wing-backs stay out-wide, which is why i guess my wide center-backs are underlapping instead of overlapping.
Ideally they should alternate between underlap and overlap depending on the situation, but if I have to choose I would like to have my two WB's attacking the channels and my two WCB's overlapping, all covered by my 2 CM's.
Having read most of your article on the 5-2-2-1 you used at Íbis Sport I would like to have your overall opinion on the roles and duties I used in my system and how to implement those wide rotations.
Great job by the way, very educational