What an absolutely fantastic album. I really feel like the second-half of the album is the strongest set of songs - Walt Grace truly is Mayer's best song ever. Hopefully it won't be too long until we can see some of these performed live.
I heard he has to have another surgery to clear things up. He said in a recent interview that he'll have another album out by the start of 2013 so he can have two albums of material to tour on. Soon isn't going to be so soon.
But i agree with your post. Arguably his best album to date. Nothing will top 'Gravity' in my books, but Walt Grace comes really fucking close.