Wonder how something like this on elevator would work out. If it had a form of circuit breaker on each servo, then in theory the good servos could possibly overpower an un commanded full deflection until the breaker tripped, work a dead free swinging servo, or possibly strip the arm of a frozen servo. I'm sure it'd have to be tweaked with the right equipment (possibly plastic gear servos).
I understand that no matter what you do with your elev setup, you still only have 1 TX & 1 power distributer, but I think full scale is so safe today because known problems are addressed one by one.
Jay