Thanks for the support guys!
I'm not sure how hard or easy it would be to implement but I like the idea.
It would probably require slight changes to small areas on each planet (to make the 'items' surroundings fit if there aren't and suitable places already incorporated), and adding a few enemies to guard them or perhaps the odd instanced area would take a bit of effort. So it's not likely that this would be done in a small patch. Although instanced areas are just an Idea to add a group/teamwork element to a couple of them.
However I don't know much about game design or coding, so I'm just guessing...