@bendmeoverbackwards it doesn't make sense that your DD is worried that Exeter may not have enough going on when she really wanted Durham. From what I have heard about Durham, not much goes on outside the university. Which would suit my DS fine but I know some DC's were worried about it's small town vibe.
Have heard good things about Manchester from friends who have either gone there or their kids have. Good employability rate and plenty going on in the city. It's top choice for DS's best friend at school.
I have heard that Exeter is like an extension of boarding school. As your DD is a little worried about leaving home, won't that suit her better?
Manchester is ranked only a couple of places below Exeter for History . Not sure about Ancient and Modern but she was thinking of changing courses anyway?