I understand where you are coming from, but mining has always been more sensitive to pirating because you will be sitting still in a large ship, waiting for ore. That is also why mining is so profitable - because the risk is large. I was never really into mining, except for a little while during the famed "Dublin Gold Rush", but I soon realized that I am not cut out for the stress and grief that follows. The mining mod drives people crazy. Really...
If you are deadset on mining, I don't see why you can't coordinate? Pool your resources and hire mercenaries to keep the system clean of caps for an hour or so, while you can all mine like bosses?
And if there is low/no RP before engagement, submit a sanction report. The admins might not side with you or look through your report properly, but if enough people file sanction reports on the same quiet or setmsg engaging pirate capital ship, sooner or later a sanction will happen.
In short I don't see what these problems really has to do with cap/snub/transport balance, when - as I see it - most issues can be circumvented by RP measures.