Haven't seen this point mentioned. With the back three, the amount of passes that Mignolet receives when circulating the ball around the back, and playing it around opposition harrying/pressing is massively reduced, to almost none in open play. That is one weak link we have taken out of the team during possession and its been a refreshing sight to watch Sakho and Can thread passes through opposition players to relieve pressure or start attacks when it looks like we're being pinned back. Not a criticism of Mignolet, he is what he is, so lets let him be that and not force a job on him that he can't do well, that negatively affects the team.
I really, really like this shape. I think it gives us stability and balance, but personnel wise, we're still short of a prolific goal-scorer or two, and no chopping or changing of shape will change that. Though putting another goal-scoring midfielder or striker into this set-up would be very easy, so that's a plus.
Another problem is the way we're playing three at the back, I like the way Rodgers has decided to opt for two conventional centre backs and a half/half centre back, originally Johnson but now Can. Someone who isn't a bona fide centre back but has enough traits to competently play as the third centre back in a back three, whilst also adding something to the midfield and occasionally the attack. Its an attempt to solve the problem of a back three, at times, being overly defensive in possession, someone like Can or Johnson can contribute in possession and attack. Barcelona have been trying to do it for years, using a midfielder at centre back in a back four, but the problem is that you put too much responsibility and pressure on them in a back four and a centre-back partnership, that responsibility is relieved considerably in a back three. My problem is what happens when Can gets injured, I think he is such a fundamentally important cog in the tactical structure of the team, that if he had a long term injury, it would seriously disrupt and limit us, if he wanted to use this shape as a long term solution. Maybe I'm overplaying his importance, but I think his role is a major reason why this shape works so well. Pressure, pressure, pressure, Can, no pressure, attack started.