I'm always surprised by the "it's her decision, leave her to it...." sort of comments. When else in life would we let our children choose to spend £50k on something without trying to guide them towards making a good, well-considered, decision?
That's not to say it must be RG, or that satisfaction scores can't be considered, but that needs to be part of a much wider discussion about the reputation of a uni for a particular subject, the employability of their grads (including perhaps opportunities to do internships/ a year in industry etc) as well as city/ campus, travel/ accessibility from home, cost of living there etc.
I'm sorry, but I don't believe many 17-18 year olds are able to make great decisions about all these things on their own, and are unduly influenced by their peers and what they read on The Tab etc! I've had 2 DCs apply and go to uni and while we never said they could/couldn't go anywhere, we spent time helping them research their choices to come to 'good decisions' which were grounded in solid data and research. Both were very happy with their choices. Meanwhile some of their friends seemed to choose based on which were the best 'party unis' or 'good for sport' or because friends or girlfriends/boyfriends were going there. Not all have had great experiences - I can think of two who dropped out (one reapplied elsewhere the next year), one who realised their uni wasn't great for their subject, and one who was very very unhappy in a far away location when their relationship broke up.
Help your DD to see the wisdom in considering a greater range of factors than just satisfaction scores for a flawed survey, OP!