The problem is also that Barça is prisoner of Tiki Taka. Tata Martino tried to bring some fresh air and a style free of the obsession of possession with possibilities to counter-attack, wit moments of low pressing, less intensity. But when he "lost" the battle possession against Vallecano (while trashing the opp 4-0 mind you), some Barça heads came gunning at him because he was diluting Barça's essence. Dude was low-key forced to go back to the previous possession football that was trashed by Bayern and that's when Barça became predictable, though they still were successful somehow.Barca's style worked better with mobile strikers like Eto and Villa pre-injury, Suarez does not strike me as a striker who will hang around the 9 spot and find it hard to drift to the wings. The problem for them would be that he is a dribbler and Barca seems to allow only Messi and Iniesta time on the ball to take on players. Neymar and Sanchez look a lot free for their NT outside the shackles that Barca has become because of their rigid style.
I think it's Barça's fault that their season was garbage. Had they put away their obsession (as if the Bayern reality check wasn't enough), they would have won at least a title this season. And Xavi (as much as I like the player) is a burden (for both Barça and Spain) these days. Dude doesn't care if they lose as long as they have the possession. Counter-productive as hell, above all when you're an icon like him.