I think Murray really struggles with the conditions here. Having watched Djokovic and Murray matches, you can see that they are not playing as they do usually, more mistakes and more margin on their shots.
I have watched Murray's post-match interview, and he said he changed his racket tension adding 4 or 5 pounds just to cope with flying balls, wind, etc... I am not convinced that it is so much paternity related. If you look at his results in Indian Wells, he only reached the final in 2009 and twice the SF for a tournament he plays since 2006. In the same time frame, he won Miami twice and made two finals. He really think he is just struggling with the conditions.