It might be an abrupt power loss, but you could activate the BOV in a failsafe event. Not sure what it dumps boost to, maybe all the way to atm., but it would certainly protect the engine.

You could use a secondary BOV with smaller orifice, or any valve for that matter to limit the amount of boost dumped leaving the primary BOV to operate normally. It would be a bit of trial and error process, but could be a smoother operating system.