I see and I hear the reasons for a neutral at every "box". Yet the practicality of the problem shows that when you have a 2 gang box, with two dead end 3 way switches located there. You could always install a occupancy timer/sensor at the OTHER side of that 3-way switch wiring. SO a neutral at that particular box, should not need, (or ever need?) a neutral there at that 2 gang box.?