Ngl I would love too see a proper weapon crafting system in the game and a proper weapons modification bench. Like we go up to the station with say like a scout rifle. We can choose what type of frame it has, what rate of fire, type of sites, muzzle attachments mag size etc etc but then also have the ability to recalibrate the weapon perks like in the division. If we wanted to add an even further level of optimisation we could have different scopes role different stats I would also love a return of strength, intellect and discipline because I loved optimising those stats in destiny 1. Skill trees need to return I’d like too see ship combat and more vehicle based combat (they proved them can do space combat in The Long Night of Solace in reach) I’d also like the option of a player home that you could customise, either a flat inside the tower or in your ship or something. Like you could have armour stands and weapon stands that you could display stuff on(even if you were still using it there could be like an option to display current load out) and like different achievements could earn different rewards/ relics that you could display. Like idk by killing Crota in D1 you could have the sword on display or you could have the aegis (shield) from the Vog on your wall or something idk I’d also like to see player trading, using silver or something( a bit like warframes plat system) I think all these features would be great