What bothers me more is "that final OK" that you have to hit when you're seeking a Nav route.
Like, when you finish punching in an address (which takes several steps), or if you punch up a "Previous Destination," you think you're done, right?
But you're not -- the Nav makes you punch an additional "OK."
I'm surprised nobody else has ever mentioned it. (I posted it a long time ago on another site, and nobody else thought it mattered.) I can imagine that it serves a purpose theoretically, but 99% of the time it doesn't -- it's just a nuisance.