Going by our record of away CL games (just 4 wins in last 13 games), it's obvious that the tactic isn't working. For Barcelona, the mistakes the managers make are easy to rectify. But all these managers are stubborn and inflexible. Started from Pep and now Lucho.
1] 4-3-3 with a defensive mid like Busquets will not work, hasn't worked last 3 years, won't work now. He was lazy previously, now he is a liability. Everyone knows that, and he was exposed badly in the world cup even with a defensive player like Alonso along with him. If he plays (I would rather play Samper), Masche should play next to him.
2] Pedro is worthless, if anyone is willing to pay us around 25m (not worth it, but beacuse of brand name), I will be jumping in joy. Not just beacuse we lost the game, I think he has been complete shit last 2 years. Not any better than Welbeck. With him wide, we simply play with 10 men. Luckily we have Suarez in his place.
3] We can't have 2 full backs bombarding forward at same time. Alves is anyways a complete waste, has been a waste last 2 years.
I would personally liked to go 4-4-2 in a away CL game without Suarez. Pique in defence, Masche in CDM along with Samper/Busquets. Pedro should not even be in the bench. Alves shouldn't be allowed to touch the ball. Montoya should be bang on starter, no questions asked.
With Suarez in the team, I would play 4-3-1-2 or a more traditional 4-2-3-1, with Messi as pure #10.