HUD

From NS2 community wiki

The NS2 HUD will be extremely minimal. The only persistent HUD element for players on the ground is their resources. The minimap is gone. Your health draws when it changes, and then fades away. If you are very hurt, your whole HUD pulses red, ala CoD4. Everything else only fades in when it changes or when you need it. (Forum post by Charlie)

For waypoints, the HUD will draw arrows to point you to the door/vent to go through next, giving directions to your destination (Forum post by Charlie).