Simple answer is to quota the number of bouncers. I simply think batsmen trying to do what Smith and Bravo did and bat on are doing their health no good and that it could be dangerous. Think you're taking this hugely out of context. As concussion can take time to come out, how long do you delay a player? Do you let him bat in the second innings?
You havent even answered the one question I posed.
Bouncers are already on a quota and it hasn't stopped the recent incidents. Do we dilute even further?
Cricket is a sport, like many others, with an element of personal danger. A very small one, but it's there, and every batsman accepts it each time they walk out to the middle
At international level, I'd suggest a stronger more defined protocol that is applied by an independent expert in each game. Don't put pressure on the team doctors to implement.