Yes, we won lots of games against lesser teams with it, I'm not denying that. But it didn't work against decent teams, it got badly exposed. Blaming it all on Yaya's legs is pretty disingenuous as well as Kev was as much to blame as anyone.It's our most used formation by a mile...most of our victories came with it, and the main reason we lost some games with it was because we got stung with Yaya's lack of mobility when losing the ball, Fabinho addresses that.
I've no issue using it against lesser teams who will cede possession, but if the other team is actually going to battle in midfield then we need the balance we had in the Barca game