Honestly I'm unconvinced that a single-payer option is better. With a handful of the right regulations (and a lack of the wrong ones), private industry should be able to achieve lower costs and a better user experience. Governments do have negotiating, innovative, and competitive power, but I can't imagine it can compare to what the private market can achieve. Under the ACA, each company will have incentive to provide better coverage for cheaper prices than the other companies, but when the government runs its own insurance, it tends to be able to outbid initially but not have as much incentive to improve

However, a potentially big problem is that without single-payer, hospitals will still end up caring for the uninsured who show up at the ER, and they'll still have to write it off as a loss and raise prices to compensate. Unless there's a provision where the government will cover all costs accrued by uninsured. I don't know if there is