Technically that's not what he said though. He didn't say that Lucho is the best manager.
He said that nobody could have done better that Lucho for Barca this season. And if we win the treble, one can easily agree with that, as there is not much left to better that. Most goals scored, least goals conceded, win against nearly all big opponents too.
Yes, I could have misintepreted that, and if that's the case, I apologize. However, we still haven't won any trophies. We will likely win at least two, I hope. And even if we do win all three, there's no way of knowing if someone could have done it also, or if Lucho is the only person who could have done it. What I can't support, however, is the claim that Lucho is the only one with the competence/talent/vision/ideas to make it happen. He's done extremely well, but there's nothing that suggests other coaches wouldn't have been able to do the same. Simply because they haven't tried.
I do take my hat off to Lucho, though. I was very critical of him earlier in the season, and not in my wildest dreams could I even imagine the current scenario. His decisions and most importantly, his attitude indicated we were going to fail big time. For a while there, it looked like we were heading downhill with even greater speed than in the past two seasons. Well done, Lucho and everyone else who made it happen.