GPX import (from SkyDrive)
GPX export is awesome. Being able to restore those exports would be great too though. (This may be a dupe of https://cyclometer.uservoice.com/forums/189599-general/suggestions/3926631-routeplaning-by-importing-map-points-of-f-e-googl but that one sounds slightly different...)
Starting work on this.
Also download from RideWithGPS would be awesome. Cycle Tracks app allows you to do this by the route number and it is very useful.