Not impressed with people swimming when they should be locating water sources.
So far there are a couple which are showing a bit of gumption. The main one at least with fire appears to be the young lad that works on his families farm. I would imagine that they are all trained to do the bowdrill side of life, not doing so would be stupid and there were more than three of them giving it a go, it was just a case that it was mainly those three. I would however defer to the people that proved better at fire by friction. If this group of people are better / more efficient at it then why not let them get on with it?
In some ways the others did what was right, by doing nothing they were conserving calories and water.
However at this stage they should be looking at some form of concurrent activity whilst they have strength and calorific reserves. They had come across a game trail, why weren't they thinking of trapping it? Why didn't they try to source a secondary water source? Collection of materials to maintain the fire. Foraging for useful implements, they did to a degree, but they could have done more.
The first three days you should be getting the basics sorted and then getting into some form of routine, this does mean that someone will require to be in control and organise them. Under normal circumstances you'd expect the policeman to take control, firstly because of his age and secondly because he's an authority figure, but I'm sure I heard him say that he was missing his mum (91 years of age) and at the age of 70 he probably won't be dynamic enough to mobilise the others.
You have a neurologist, he's reasonably young, but in the end he's a doctor. He is used to making decisions that effect peoples lives and it is a position of trust and authority in normal life and people like the familiar. He can understand what will be happening to the guys both physiologically and to a level psychologically. I would think you'll probably start to see him coming more to the front.
Having said that you never know, but it's good to think these things through.