I still think we should go all the way to single-payer. Other countries have had such success with this model that it's becoming very difficult to argue that it's inherently flawed (rather than the other way around). If the US health industry had to compete directly with any of these systems, it would go out of business tomorrow, since they offer similar care (in terms of outcome rates) at half the price per person. That doesn't even include the effects on entrepreneurship and employment!
While the ACA did little to fix the "US health care costs twice as much and doesn't deliver better outcomes" problem, it does have a good shot at fixing the preexisting condition and individual insurance debacles.