Back 3 would be a mistake, don't get the obsession with it especially away in the cl
Mats
Sergi pique. Umtiti alba
Mash
Rakatic. Iniesta
Messi suarez neymar
Perhaps because
1. Roberto is a not a RB
2. Messi cannot play as a RW in this 4-3-3 formation unless we have an absolutely dominant midfield
----> Which leads to the same problems we've had the entire season of the right side becoming useless and teams packing the center and the left side leaving us with no space, pushing us back ----> Which again leads us to not being able to withstand pressure having a midfielder less and retaining possession
Have you seen us this season with the 4-3-3? I'm sure you'll recognize all those problems then, the same problems that exposed us against small teams in La Liga and exposed us really badly against PSG
In fact, the only time we've actually played well and looked like Barcelona is under the 3-4-3/3-3-1-3 formation. That formation has it flaws, but we play so much better in that setup than in the mess of a 4-3-3 we've employed all season long