I know 64bit overlays have been asked before, and i know this is a lot of work, but PLanetside 2 will be moving to 64bit (and 64bit only) (https://twitter.com/j_smedley/status/430858902792445952).

I would guess many people are using Mumble with Planetside and i would certainly welcome it if overlay still worked when the game moves to 64bit builds.

The lack of overlay would be a no-go, because when you have 48+ people playing, trying to coordinate it's important to know who is saying what.