they were only asked to go to the coach and say 3 things about how they and the team could improve, it didn't have to be a ppt or an essay.
Times have changed since the likes of Lillee, Marsh etc - these guys are all given significant sports science training and expected to perform to measured levels, it isn't an amature joke.
Dropping them must be harsh, but the delivery of what was expected was not exactly taxing and they had 3 days to do it. If you can't do a simple task, how are you expected to perform under pressure.
Clive Woodward did similar things, just not so publically