Oh, yeah, I'd agree that the populations of elections aren't really very informative. One reason I don't care that much for 538.
Probability is supposed to be an all or nothing propsition. (Or close enough.) The more guesswork you do, the more you stray from it. I don't see the point of that. If you want your feelings to be a factor, if you want to see 85%, just skip all of the polls and everything and make a chart of your feelings.