I think this may be a feature request, but is there any way to set the horizontal velocity and direction on the ManualCopterPilotingItf. The way it is right now you have to specify %x and %y, which not useful.
I realize the guided interface may have part of this functionality, but it also apparently has issues with fast refresh rates: Drone twitching during GuidedFlight
If you upload waypoints to the drone, does the onboard flight controller have the ability to hold a specific speed and direction or does it also have to use percentage based controls?