I don't think you've read many Utopian novels if you think they give a vision to aim at. Many are just criticizing modern society by use of a fantastic one; Butlers Erewhon is a utopia where you can be jailed for being sick, and forgiven for such things as embezzling. More's has slaves wrapped up in chains of gold, which is seen as worthless.

The ones that try tend to not really give us things to aim at, as opposed to things to avoid. "The cure is worse than the disease" comes to mind. They end up being a collection of the pet quirks of the author, often nasty ones.