The problem was not because of Lucho but his inability to bring new ideas to the team. I think the players were getting lackluster because of that. They wanted new methods and practical way to deal with aggressive pressing which was haunting barca for a long time. Bielsa created it, Mourinho perfected it, and latter Simeone and rest of these coaches (Unai Emry, Ernesto Valverde and others) followed it. And it’s sad to see every single club is utilizing this tactics to defeat us. Now we need more dynamic coach, who has the mettle to overcome these situations and bring in more interesting football.
I would go for Bielsa, but he's too crazy for his ideas and may cause conflict in the dressing room. Or else Sampaoli, who is great tactician. But I do have another name, ridiculous to think - Roger Schmidt.