Why do we need to be able to walk around our ship? For the same reason why we need to fly through a gas giant's rings, or drive our SRV around on a planet, or see the faces of mission givers, or see our holo-selves. Yes, we could play the entire game in a spreadsheet too, but we prefer to do it in a game environment with beautiful graphics because it is more immersive.
To me, space-faring is all about being able to walk around your ship. How interesting would Star Trek be if every episode was limited to the bridge? How would the plot of Alien have worked without Ripley exploring the Nostromo? Space Sci-fi and walking around your ship go hand-in-hand.
I honestly don't even care if they never implement any actual mechanics behind it, but to simply be able to set my ship on auto-pilot and have my character watch the stars go by from his personal quarters while sipping a cup of tea would be pure gaming bliss. I've dreamed of doing this my entire life in a game.
To me, being able to walk around your ship mid-flight to some far off destination in first person would be incredible, even more so than walking on planets (because that has been done). Now, to make this even better, I think they should give us the ability to fly to stars in FSD, without hyperjumping. Also, it would be great to actually see and talk to your NPC crew members and passengers, and also to see how your ship's interior changes based on your internal modules.
Believe it or not, there are a lot of us out there who are not power-gamers, but see the game as a relaxing and immersive universe to be explored and experienced, not just "beaten".
See, something like this could work if we were having early design discussions for an unreleased space exploration game.
But ED has been around for 2 1/2 years now, and there's a lot of other mechanics that would have to come into play in your scenario.
So you're sipping tea staring out the window in your ships lounge. When suddenly the ship alarms go off.
You drop your cup and start sprinting towards the deck.
*Stop, wait for door to open, continue sprinting*
You round the next corner and get get slammed into the wall and fall as you hear the loud boom of an interdiction drop.
You get up and continue sprinting to the main deck. As you stop for the deck door to open you hear your ships computer "Shields offline."
You finally get in and sprint to your chair and sit
*wait for sitting animation to complete*
Finally you get your hands on the controls, look down, and see 23% hull. You hit boost, but are greeted with a "thrusters offline" message, and a few seconds later "eject, eject, eject".
Followed by the lovely rebuy screen.
Now the first time this happens, it would be awesomely intense, and worth the rebuy.
The second time would be a little frustrating.
The third time would be worthy of menu-logging.
After which you'd probably decided you're better off manning the helm than sipping tea in the lounge. Speaking of that, how long before passively staring out the window gets old?
My point is, FD has built a whole bunch of combat into elite, and even more is coming in the form of some supposedly nasty aliens. You can try and have a nice calm exploration experience, but unless you're well away from the bubbles and known alien locations, then, well, you can't have it.
This is precisely why I want a deep-dive on exploration mechanics and content. Make it enjoyable and compelling to stay out in the black for extended times.
Once they've done that (and some other core elements), then sure, add walking around the ship so you can stare out the window in your lounge... if that's your thing.