First of all, thanks for taking a look at my post.
I may have to retract my statement that some get EPP anyway. My coworkers have complained of this happening, but no one seems to have any proof.
One of the things that concerns me is that after a newly imaged Windows Embedded device is joined to the domain, the Endpoint Protection Deployment State shows "To be installed". It never seems to actually install, though (which is good). The logical question would be, what does it say after a few days? But that brings me to the other issue, which is that the WES devices drop out of SCCM a few hours after they're set up. Sometimes, a few days later, they'll randomly show up again. This doesn't happen to any of the thousands of PCs on our network.