my opinion: the stuff is too small on your hud and looks (sorry) ugly and isn’t enough.
i think you miss the whole athmospheric/weaponary stuff:
-You need a virtual horizon when flying on planets at bare minimum for loopings, red out, black out etc.
-waypoints/ distance to next waypoint , e.g. for races, for missions…
-distance to what you aim
-speedometer the military one i like more
-landing ray boxes would be very nice the station or airport has a radar ray and the hud shows a set of landing boxes on the beam in order for a safe land. it could also be used for races for the near optimal route.
-some thing of orientation, on planets a heading, something for orbit and something for interplanetary flights.
i think if you want to fly to some planet marked on your map you should also get the same as he landing boxes.
you could in orbit use a much simpler hud, maybe like yours, but you need orientation to the next asteroid, capital ship etc. so a horizon would be nice in a certain range.
if you arm something:
-depends on what you arm a different hud, a short range heat seeker has a different behaviour as a radar long range missile or a bomb or topedo. the hud should show that.
-the crosshair looks good to me also with the different style wether the target moves away or not.
-the crosshair should have a large “X” if you aim a friend with a rocket.
-with long range radar missiles, there should be a large circle, showing the aim area.
-max aim distance for radar missiles should be shown.
-heat seeker small circle as they have a smaller aim area and shorter range.
-a shematic display of the ship with loaded weapons showing what missiles/bombs you have left/armed.
-bomb display a circle with a dotted line where the bomb drops
-torpedo maybe something like the radar missile, but should show up different.
and with ALL that you cannot display this on a SINGLE mode hud
you need hud modes, wether you are in space, atmosphere, landing, weapon you have armed
and KEEP it simple it should not go in foreground you need to keep focus on the fight
so the best way is something like military displays, of course you have more room if you use a helmlet visor, but i don’t know if guys like it if the hud spawns over the whole display, it can be irritating, maybe show A BIT something like your helmet glasses where it is displayed upon.
just my 5 cents
EDIT: and you don’t need a hud when not in cockpit view. no good simulation does that.
but las for the ones who like to fly in thrd person, one could implement such a view.