"The problem then, is that you've no idea what you'll get after the election. Which is the reason I don't like PR."
What you get with PR tends to be a government of compromise. This is a good thing.
Governments work best when the decisionmakers de jure are _not_ free to ram ideologically extreme laws through virtually unopposed.
FWIW even the conservative govts of the mid-late 20th century would be seen as left wing these days. It isn't just the USA that's lurched to the right since 1980.