It really isn't though. I ran into issues with 4.2.2 as well, but managed to solve them via the AOKP forums. One of the major issues you might notice is if you flashed the update with your volume rocker set to vibrate or silent and you use the volume keys after installation, you'll get a force close. There are two ways around that, one is to go back to a backup rom and flash that, set the volume up, and then reflash. Or the easier way is to remove all items from the toggle menu drop down bar and then re-apply all the items you wish.
As for blue tooth, it wont connect it wont find my blue tooth device so I don't think it would be a Gapps problem, some sort of code issue. I saw the new 2013-03-01gapps. I turn on my BT with the toggle to on, nothing, go into setting and it shows Galaxy Nexus CDMA 2 not visible to other Bluetooth devices
I tried to search for it nothing. so I am at a loss.
The reason is because Roman rewrote the toggle code, which is causing a null error with anything saved from the previous ROM.
As far as the Bluetooth goes, I am having no issues with Build 5.
I'm sure this has been mentioned before, but make sure to use the latest GAPPS that was released a couple of days ago.