I picked up a broken XR1000 the other day, and indeed, it really was broken! But the Antenna are fine. They are original Netgear SMA female connectors. If anyone wants them, they can have them free. Just let me know.
I just checked QOS on mine and it seems to be working fine. The thing I would check is are you sure the router is detecting the game? Look for the "LEDs" in the user interface lighting up to see if it is detecting high priority traffic.