I'm sure someone more talented and braver than me could take on that little section at the top! There are loads of smaller drops and runnels on the way down which would make it a belting descent even carrying the first bit (were it not a FP, obviously).
It's a pity the radio mast track is tarmac most of the way, though I don't say that when I'm climbing it.
I like Mossdale - as you say, it's quite a remote and forbidding spot by Dales standards, especially with the tragedy associated with it.
I've often thought about trying to push through to Kettlewell from Mossdale on those shooting tracks as a way of linking back over to Arncliffe, and I'll take a look at the satellite for your route.