While that's horrible, and I see Apple's Maps as a kind of swindle (they're ripping customers off by taking away a valuable service that customers paid for, without warning and without consent, and they're benefiting at customers' expense by forcing them to tolerate the growing pains of a half-baked system, something no one volunteered to do), couldn't you have compared Apple's routes with Navigon's or Google's before you left home?
We shouldn't have or be expected to.
I have driven across the country a few times with nothing more than a Rand McNally paper map. Not once did I think I should verify the info against another map's data. When I lived in Los Angeles, I had just a Thomas Guide to get me around. Again, I never thought to confirm the info before I left the house.
Since then, I have used a GSP unit and now an iPhone... each for years without (major) problem. Suddenly, thanks to Apple's "upgrade," that all changes- and I'm forced to not trust maps or suffer.