I am against and agree with Andyson.....just opens up more loopholes for players to gain an advantage, regardless of how often it is used.
I have never seen a pro say....can I come back later, something better has come up (or I will be back after practicing this shot)?
I do understand the Alt Shot offers etc....but we are talking 30 minutes tops...if you had just teed off in an 18 holer.