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I appreciate your passion on the subject. I suspect the resolution will be from a number of small steps. That said, my thoughts are...
...Lane splitting
While I'm not a big fan of lane splitting I do concede it can make a difference to the commute rider. I can't imagine how you could consistently enforce proper use. How do you say what is too close or who is at fault if there is contact between a bike and another vehicle, etc.? While I don't usually take LEO's view of things you don't want to saddle them with an impossible enforcement task that'll just invite more grief.
...Cost
I suspect there are a number of people who would gladly commute on a small/mid sized bike but for the cost of inspection, registration and insurance. If a way can be proposed that drops that cost it should help. I don't know if it is feasible but what about linking the registration on all the bikes you own as though only one would be on the road at a time.