Well...I can't add any more to this thread I'm afraid. Due to various reasons, we ended up staying closer to home and doing a 38km route north of Lausanne, around Chalet-a-Gobet, and winding our way back towards town, as offroad as possible.
It's a nice ride, not technical but has some "cheeky" climbs, some flowing downhills and gets the lungs working (1315m climbing

)
Am definitely interesting in trying the route at Saleve though, possibly a mix of routes 2 and 3 as it looks like they pretty much link up...so if anyone is planning to go up there please put a post up.
Cheers,