Speaking only for myself, having officials who hustle even is probably what I'd look for first, that and consistency. Seeing I don't know all the switching mechanics, I wouldn't know or necessarily care about how much they switched in a summer game, as long as they hustle.
I'm not sure if this is the norm, but last year in a summer a game, the trail was about 6 feet shy of crossing half court and called a travel down in the opposite block with the ball handler in heavy traffic. I'd love to know how he keeps his eyesight so sharp