I don't understand why people are so against Lucho. Yes, they don't have same control anymore, but if they try to play 'exactly' like under Pep, they will fail. Xavi/Iniesta don't have same control/influence anymore as they had under Pep. I am not sure how much say Lucho got in Suarez signing, but Messi dropping deep helps them create chances like his ball to Alba. If Messi plays his old role, the chances which Iniesta used to create will not be there. Messi being left footed and drifting towards left more, he brings Neymar into play more than Suarez. If Xavi or Iniesta from other side can bring Suarez/Alves more into play, they can utilize right side too.
Their negligence in buying proper quality CBs hurt them. Have 2 good CBs, play Busquets AND Masch in holding role, Rakitic/Xavi/Iniesta to complete the trio or combination of any 3 from the midfield 5 depending on matches, and then the front 3 will be very effective.