I tried it in 1.2, and quickly tired of chasing down the fragments.
Tried it again in 1.3, and am really enjoying it - found a nearby Hi-Tech system that has a planet with Metallic rings in Major reserve, and have taken to alternately mining and killing the pirates who try to interrupt. It's a nice change of pace, but I also pack an interdictor to mix things up when a fun mission presents itself.
The drones do have a few quirks (I jettisoned that for a reason, you pesky bot), but nothing I can't work around. My wish list is as follows.
1. When the hopper is empty, don't set the focus to the first slot - I've accidentally jettisoned quite a bit of Palladium that way.
2. Let us tell the drones not to pickup "stolen" cargo, so I can get rid of stuff without them picking it back up.
3. Give us the ability to target the asteroid in front of us, and determine both it's content as well as it's "status" of depleted. I miss a lot of asteroids, 'cause I can't tell if I've already drained it unless I shoot it again. Too time consuming, so I target a distant object, and work in a straight line.
4. Let us stow the number of limpits it can control directly in the controller (say 2 for the A3)
5. Make the limpits time out in the same intervals, rather than at random