I also feel like we will see the best Messi at the WC and next season. Regardless of what anyone says, the world cup has to be in the back of his mind. I still feel that he has been trying hard and doing all that he can to win games for us, but he hasn't be going above-and-beyond super saiyan mode 110% like he used to in previous years. That, to me, is probably due to fear of re-injury and acknowledgment of the impending World Cup. He plays smarter and more calculated... but he still tries, how anyone can doubt that or call him "lazy" or "apathetic" is beyond me.
At the same time... he probably sees that running like a headless chicken is worthless anyway. DonAK nailed it. What's the use of "running more" if he's getting the ball in useless and pointless positions? He walks because he knows it is up to his team to advance the ball up to a certain point, where he then gets in positions to make runs or get the ball and try to make plays. Messi is the definition of efficiency in my mind... he always has been. He doesn't run around when he doesn't need too... he conserves his energy for the right moments, and then explodes in bursts to beat past defenders and make plays. His calculated energy expenditure does not = lazy IMO.
Basically, I feel like Messi hasn't been 100%, but he also hasn't had the environment where it's even been possible to reach that level. When you factor in the fact that he is attacking with essentially incompetent strikers (Pedro and Alexis, therefore always making him ultra-marked), the club has an overall bad vibe and atmosphere about it, none of the players are on the same page tactically, and we go through Messi and the middle far less now... and we never play triangles or 1-2's.... how can anyone expect Messi to play at the godlike level he was at before at this time?
I feel the World Cup will give him some fresh air and re-invigorate his hunger, and he'll dig deep and try to bring out his best. A new coach, a fortified squad and some new motivation and sound tactics and I feel that Messi could EASILY return to godlike levels by the end of next season.
The talent is there just as much as ever, it's just the team is dysfunctional, and it's unreasonable to expect him to be able to perform to his pre-injury godmode level at all times and bail us out. I don't think he deserves as much criticism as he's been getting... even in his less than 100% state he is still our best player by a margin and our most dangerous goal threat.