This girl sounnds like an immature prima donna whose freaking out. If I was the coach I probably wouldn't want to coach someone like this so its probably for the best she quit and he didn't have to kick her off.
If its true (and I doubt it) that she has been running 80-90 miles a week than what's the big deal taking a little pre-season two week period where she cuts way back, it would probably be good for her. He's more than likely trying to keep her from getting injured and help her stay fresh.
On the flip side, I ewould think the easiest thing is to let the girl do what ever she wants in training. Obviously he doesn't have a problem getting her to do the work, which isn't the case for 99 percent of the kids you coach.
What happened when the internet came around was good and bad for distance running. The bad thing is every kid thinks they are an expert. She's freaking out about 200's and 300's like its going to ruin her career (which more than likely has peaked). I watched Peter Tegan's Wisconsin Women , 800 through 10,000 meter runners) run weekly speed work including 200's and 300's every week from November through June.