I would like to see the guide me feature improved.

At the moment the guide me feature is semi useless. It includes zero filtering so the moment you slow down, the expected arrival time immediately begins to jump. 

The way I imagine this working is I choose my route while hiking. I can stop, take a temporary pause and look to see what my projected arrival time is for my destination along the trail. Every modern mapping app has implemented some form of filter to arrival time estimation so it doesn't begin to spiral out of control the moment your pace slows or stops.