Cottonwood
Roadster#433, Model S#S37
My advice would be to shut the thing off until Tesla irons out the obvious flaws. For now, based on my experience, it's useless. Not only that it will attempt to divert you from a carefully planned route, which ours is.
I agree completely, and have had my "Trip Planner" off (toggle is somewhere in settings) for quite a while now!!
What is very useful, and not discussed much, is the Energy:Trip screen. Set the Destination in the Nav, then use the Energy:Trip screen to look at the predicted SoC at the destination. When going Supercharger to Supercharger in good weather, I have found charging until a 10-15% predicted SoC at the next Supercharger works well for me. If the weather is bad, the wind is in my face, or I want to drive faster than most, I charge more. If the predicted SoC starts getting low while driving, I slow down a little, then check again in 10 miles, repeat until predicted SoC at destination is comfortable again.
In my opinion, once you get used to it, the Energy:Trip screen is the best addition yet to the Tesla for driving the Tesla comfortably and minimizing charge times.