Just an idea for Khaam single hive research, (Or possibly baseline? May be too much). Primal Scream: When activated by the Khaam all aliens receive a significant speed boost which lasts for X seconds. Breaks on damage.
The idea is to allow aliens to respond to threats in the hive, or elsewhere, much faster, while not directly copying the beacon ability. It can also be doubled as a lead-in to a big attack (thinking gorges doing bile-bomb support in the wake of fades/onos). I think it should be audible to marines in the vicinity of the hive too, so they know either a big push or a response team will be incoming very soon.
Could perhaps instead (or also?) be used to speed up the respawn queue, which would give it more similarity to the observatory beacon.