Same kind of problems here with AHVoice. My squaddies say they can hear me OK, but I can barely hear most of them. Every once in a while, I connect with someone I can hear just fine though.
I haven't changed systems, and RW worked great. I don't recognize most of my squaddies voices anymore either - most sound tinny, garbled, and weak.
I wish there was a way to disable AHVoice. I'd go back to RW in a heartbeat.