He's already improved from winning La Liga games with low scorelines and late goals to scoring 5 in the last 2 home games against respectable teams (Sevilla, Espanyol), from losing "big games" to winning 3-1 against PSG in a must win game, even if it wasn't full on domination and the team showed great character under him to snatch a last second winner at the Mestalla. He's also got Messi back to old Messi form as the season progressed. Whether that's a coincidence, down to his tactics with Suarez upfront or his fitness regimen I don't know. But that's good enough for me for now. Oh, and did I mention that set piece defending has improved? At this point last season teams like Valencia and Sevilla were killing Barca on set pieces. All he needs to do now towards the business end of the season is draw the correct conclusions regarding performances of players like Mathieu, get Busquets and Iniesta back into form and Suarez should also naturally improve with time. Even if he's decisive his touch is heavy right now. Then I'm satisfied, don't think the squad has much more potential than that.