The Beacon on for start is fantastic but even more important than that is the "Prop Clear" call IMO. As for Nav lights on during the day I don't really see that as necessary as the beacon lets people know that the master is on. One can't really discern a Nav light that is on or off in bright day light anyways, better off to save em for the night or poor vis conditions.
PS. This is for light A/C operations not Commercial Ops.