I say this not as a critic, but as someone who enjoyed seeing Webb in his prime and would love to see him revitalize American running and tear up the track.
I think the man needs a good long break from running. The stresses of injury, changing coaches, new training partners, new training regimens, his child and the time crunch to make the Olympics have put too much stress on his body. He needs to rest and recover and focus on being a parent for a little while.
I think 2012 should be spent running when he has free time and would like to, for long, easy mileage to fall in love with the sport again. I think it's become to much of a job and less of a passion for him. Once 2013 rolls around he can amp up the hard mileage and speedwork and all the other components of an elite training schedule.
I think he needs to maintain a better diet, even when not in the peak of his training. He needs to revisit cross training ideas such as swimming, cycling or both. I also agree, he should move up in distance. He is not as young as he once was and it appears the speed may just be gone. I think he'd benefit from the strong aerobic base if he became a 5K/10K runner who used the occassional 1500 as a measure of speed.
Alan Webb is a talnted young man and has medals and records to attest to that. What he needs is time away from it all to recenter and refocus his life, get his home life travelling in the right direction and then come back to running. I'd love to see him come back and fight for one last Olympic 10K spot in 2016 to defy all odds. Best of luck to you Webb.