Kia manages to sell 100K Souls a year and thats pretty much the same box on wheels so clearly these room for both aesthetics here.
The Kia Soul is less than half the price. It's not so much that the Bolt looks bad (I think it's terrible even for an econobox), but that styling is synonymous with cheap, especially in the US (hence my parenthetical reference to "econobox"). I suspect that most people ready to drop $35k+ on a car would not be too thrilled with something that looks like a $15k car. It's also why people are excited about the Tesla, it looks like an expensive car.
So far every pure electric I've seen has had the econobox look to them, to the point where you could assume it was some sort of passive-aggressive statement by the automakers. "You want an electric car? Fine, here's your electric car, we made it look like our cheapest, crappiest car, only it's twice the price. Oh, it's not selling well? Guess it's back to giant SUVs with huge profit margins, darn." Tesla has been one of the first companies to act like it actually wants to sell pure electric cars, and more than that, make people want to buy them for reasons other that they're pure electric.