Making them sell for more but process at the same speed would likely be the best improvement to increase player interaction as people would be at the zone longer than the opposite scenario.
While I'm normally civilian biased even though I mostly play cop, leaving cmrs to PO+ was a good choice considering that taking it would be a significant run buff considering the difficulty in taking out vehicles such as the tempest. Good changes overall, I hope to see more people doing illegal activities with these changes.