Default Reduced Signal Quality after update to CM11 M8?

Hiya, I'm running the most recent version of CM11 (Snapshot M8), and I've noticed a pretty dramatic drop in signal strength. Places where I originally had LTE, I only have HSPA+. In places where I only had HSPA+, I'm down to 3g. I've already checked my settings menu to ensure that the preferred band is LTE, and I've already ensured that I'm connected to the ATT LTE APN. My baseband is UCDLK3 and ... I don't *think* there was any change made to the modem in the update. I'd really like to avoid going back to M7 due to how wildly unstable it was, but at the very least, it didn't have this garbage signal problem.

Any users experiencing similar issues? Perhaps those who have fixed it?

I'd ask in Original Android Development in the CM11 thread if I could, but the new user rule prevents me from doing that. Grumble, grumble. I already used the search function to find similar issues and turned up nothing, probably due to how recently this Snapshot was released.

Thanks!