Planetary landings will be absolute game enhancement especially if sensible goals are implemented for doing so. In one of o past elite incarnations there were such things as Mining Machines that was bought and were supposed to be placed on Large asteroids and planet surfaces. They didn't work but the idea was great and more believable than drones.
Imagine flying off to some baron rock or planet that you discovered have some rare minerals or metals in deep, deep space placing you mining machine then returning some time later to collect.
The kind of mature feature I would love to see in ED.
I used one in EF II. It did work but the amount of minerals mine was low and not of the high value I hoped for. I can't remember what minerals I got. The other thing was you had to go out into unmanned/habited space and dump it on planet then leave it. You then went off and done other things for a day or two before going back to collect the machine. It was reuseable but after using it once I decided it was to much effort for too small a return and sold the miner.