I noticed that many of the ships have what look like rocket launchers mounted on their wings. Would be great if they became functional. I stopped playing SWTOR when Destiny came out. One of the things I liked most was the Starfighter DLC which let you play PVP in starfighters. Since plenty of the ships in Destiny already have what look like rocket launchers, I think it'd be a great feature.
Also, since we're supposed to be defending Earth from the Darkness, story missions where we actually defend Earth from incoming enemy ships would be fun. I really enjoyed that bit from Halo Reach.
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Elite Dangerous, No Man's Sky, and Star Citizen are some games you should look at. Bungie for some reason feels the player's ship should be as useless as -blam!- since late 2013.