If you ask me, is popular sovereignty good, I would say yes (and I would also say that more or less how things are, even under a Monarch). Popular sovereignty comes from the people, every individual, so in that sense is radically democratic. Government should strive to be this, and make itself as democratic as possible. The actual rulers in the country will be the Representatives, but that's why we make them responsible to the people. On a local level, government can be much more democratic than at a national level
And that whole Churchill quote, democracies sucks, but it's the best option we have.