Thinking about the possible strategies and their respective impact:
If a single switch would toggle a selected effect as being on/off for all SAY commands, it would then preclude a user from later applying variants of an effect on a subset of the commands (perhaps adding more garble to a SAY when the Profile thinks the ship is damaged).
What prompted the initial request is that I have a profile with, oh heck, 600-700 different Say statements, so to go toggle the same base effect (adding a slight synthetic hum to the IVONA Amy voice) will be 600-700 iterations. Not the end of the world, but the "easy button" idea seemed nifty.
I wonder, as an alternative, if it would be better (or feasible) to trigger a one-time toggle that sets the effect up and down the command set, but once run it individual effects would still react as normal to be deleted or swapped for a different one. I guess I'm thinking more of a batch value-set than a persistent "on/off", but I could see an argument for both approaches.