I have noticed on a number of maps that it is unclear when the HQ will be lost upon failure until it happens. This can be frustrating if significant time has been invested.
Could there be a warning, either in the pre-map screen, or (preferably) on the HQ button? "READY" could perhaps change in this case.
See here (http://knucklecracker.com/forums/index.php?topic=22334.0;topicseen).
While I'm on the topic, could I ask for a relevant PRPL command or three? SetHQReplacable, SetHQLost, and SetFailOnHQLoss specifically.