What broke OTA?
In short, this was the forum community's fault.
The initial leaked FC12 factory restore has a LTE radio image that does not match the radio that shipped on the Sprint Galaxy Nexus. As a result, the FD02 OTA upgrade fails. Please stop bothering Sprint stores for phone repairs/replacements.. Fortunately you can now easily fix these issues with the heavily tested downloads available from the link above. Please verify the md5sums before you attempt to flash with either fastboot, CWM or TWRP.