A lot of the work used in Quiver is original Valve content. Development seen on the Moddb does not necessarily represent the current/finalized progress of Quiver.
A short note about the HEV suits armor and battery:
As in the early concepts of Half-Life, the HEV suit does not have any type of armor. The battery displayed on the HUD is the suits power supply and is drained by the flashlight and long jump module. When the power is completely drained, the HEV suit is disabled until another battery is found.
The batteries laid out among the flashlight portion of the Hazard Course didn't make much sense when they were used for armor, did it? ;)