Idea 1: I think this could be a great way to promote lesser known trade-routes and therefore populate systems that don't get much traffic usually.
Idea 2: If this works ingame this is a pretty good one. I'd like to see that. I'm a little worried that someone would just sit in front of those larger asteroids and shoot at it while alt-tabbed. Maybe have the ore drop straight into space for it to be tractored.