I liked this one, it was a decent twist on the deep space travel problem which made for a fun set of conflicts and adventure. Like many here, I found the end a bit disappointing, not because of the stupidity or egoism of the people involved (yes, Wild takes the prize for mindnumbing shortsightedness, but hey, you don't need to be Einstein to drive a fuel truck, and fear of change is a strong force), but because once the captain started talking, it was so obvious where we were heading. And one thing I don't like is predictability.
Interesting discussion here, by the way. Unfortunately it seems that the author walked into some kind of uncanny valley in between hard and soft SF. If you throw in time travel and/or faster than light travel, no one will say anything, but once you start making things just a little more realistic, people will start looking for the cracks. And once you start using numbers with decimals - there is just no way you can win, specially when you deal with general relativity, which is one field of science where the average geek knows the basics. I have my fair share of physics training, and I can honestly say that those aspects didn't bother me at all.
Now, about the actions of the captain. I just assumed that she thought that this project was known to everyone, after all it was probably known on earth for many many years, and all her life was basically this project (I assume she was born on board), so I didn't find it strange that she didn't think twice about discussing it with some fuel truckers. A bit naive and arrogant, yeah, but not so unbelievable.