To be clear, there are plenty of ways we can improve on the American status quo that don't ditch liberalism --- such as constitutional reform for far more democratic voting systems. But I fear they are very unlikely because by the time we had the political will for such huge steps, there will be a lots and lots of discontent and the baby will be thrown out with the bathwater.

(In that example, I think constitutional reform is scary to many people because they think that will open the floodgates to eviscerating their favor parts of the Bill of Rights.)