Ergonomically, I think it’s a dumb location. Swing your hand across the guitar like you’re strumming a chord, and the placements used on Les Pauls, Strats, Teles, and most others make a lot of sense. If the lower bout works for you, go for it.
Off topic, my favorite has turned out to be the switch on my Music Man John Petrucci. You can reach it by barely moving your picking hand, but I never bump it, either.