Ok so I have to admit to only a few mining excursions (a few days each time for the CGs) and never before prospector and collector limpets came along. Mindless is probably too value-laden a word for me to have used, but certainly I found it tedious.
However, it seemed to me that the "resources unallocated" / hopper stuck bug was a deliberate move by F D to stop people falling asleep. I mean - find a pristine metallic ring, drop in near the central edge, kill the inevitable pirate that spawns with you, fly up to some rocks, fire a prospector, swing, fire another, swing fire another - move, repeat, AHA 45% Palladium, smack that rock with the trusty mining laser, fire off some collectors, repeat until chucks stop, "asteroid depleted", - rinse and repeat.
I honestly found it the most boring thing I have ever experienced in E D. If you like it, great, but to me it is just soporific. Yes I suppose other people might find trading a real bore but I enjoy it, combining exploring places I have never been plus making some educated guesses about places not covered by / outdated in Thrudds etc and the added diversion of blowing up/running away from naughty pirates that interdict me. I don't like the idea of "mindless grinding" of the same trades continuously to raise credits but by varying the places you operate you keep it interesting, whilst having some "banker" trades / routes to raise credits for a particular purpose.