Normal priority for primary highway to avoid strange routes. Decrease priority for grade1 tracktype.
OsmAnd routing.xml for Inline Skating
This file adds a new option to the bicycle mode to tweak the routing algorithm for inline skating:
The basic principle is to avoid non-smooth surfaces by all means. Primary roads can be used, but the algorithm should look for nicer routes.
It seems to work pretty well, however, beware of steep segments.
Just copy the file to the OsmAnd folder. Also see a Google Group discussion.
routing.xml is on GitHub.