It's an interesting idea, and not unappealing. One wrinkle you'd still have to contend with, in terms of establishing scale - with the current vehicle mechanics, jumping in your starship and engaging the magic warp drive is actually the best way to cover any distance over 20 km or so. In the real world we don't do that because flying is expensive, plus the time and hassle of going to the airport, etc. In ED, in almost no situation is there enough friction to taking off in a ship that you would use another mode of transportation.
Recent real example: not long ago we had the Salvation event with the ancient Thargoid-Guardian battlefield. Lots of sites to explore spread across a couple hundred km on a scenic desolate planet. Would make a cool driving tour by SRV, but I doubt one player in a hundred drove for half an hour instead of taking two minutes to fly up to drop altitude and glide to the next site.