There’s not too many of them going around, so it won’t clutter the HUD. It would just be nice to know your distance from them.
Pls also make them targetable and destructable. With like 5 hull points. 
Actually useful input: Weapons that heal ships (eclipse, wl13) and maybe even heal auras could damage enemy black holes, while regular weapons heal them, as more mass gets added with each projectile. It would make engineers way more capable of assisting the team.
It could also be discussed, if guards destructor should be able to “drain” gravi lens, which in turn would make that weapon way more suitable for a guard’s purpose: guarding the team.
a dot on the hud would be indeed nice, like it is done for mass effects in pve