As for E, this was clearly a preemptive shot at Obamacare.
One of the most important aspects of the Affordable Care Act is for buying insurance to be much, much easier. State-run exchanges make that much easier.
E would ban a state-run exchange from ever being created in Missouri.
This would likely run counter to federal law, and end up in the federal court system, though I'm not sure how the courts would come down since they said that states don't have to have the Medicaid expansion dumped on them against their will -- so the courts could conceivably rule in favor of Missouri here, though I doubt it.