Specifically, I would like to be able to edit the tracklog along its path—for example, to smooth out "zig-zag" patterns or remove specific, disruptive sections of the route.

I would also like to be able to shift the starting point—useful if the navigation device was started while still inside a house or hotel, or while I was still lingering by the bike.

Similarly, I would like to be able to shift the end point—useful if the navigation device continued recording after I had already arrived at a house or hotel.