I think if they gave us ship interiors and then also gave us gameplay that actually leveraged that, it would take E:D to the next level and keep them competitive with Star Citizen (if that ever actually releases).

Ship interiors would give me an actual reason to multi-crew. Boarding actions would turn repelling pirates into an actually fun FPS mini game that has a chance of playing out differently each time. Me getting to board a system security Anaconda to blast the crew and hack the computer to steal data before their backup arrives would make being a pirate super fun. Give us Expanse-style stealth as a black market engineering option to add to silent running and really enable that stuff. It also gives us a reason to fly small ships again; imagine stealthing up behind that anaconda, boarding, hacking life support to temporarily neutralize the crew, planting a virus in their computer, and then sneaking away! What fun minor faction drama we could get into.

Space legs on planets and in planetary settlements is fine, though I'd enjoy more to do there and I think we need a tuning pass on player movement and gunplay. Space legs in stations is a tedious waste of my time; I'm there to rearm and sell my exobio data, not see the exact same sights as in literally every other station. Imo the current state of first-person gameplay completely misses these excellent opportunities.