Whole idea of the tactic is to keep the ball and create passing lanes to the wings, but also the BPD's give long/low crosses to your AF. It is crucial to have Kessie-like BBM. I've tried to change the FB's to WB's but then there's way too much space behind the line though my wb's is not slow.
Works for Milan well and tried it with Cardiff. It really depends on the ability of your D's and BBM. I can't really stress the importance of the BBM, but Kessie well.... he is pretty f'ing good