She sees problems with wts which is a good thing. Her trying to look the other way and ignore the problems is not good as she may walk into the cult with her eyes closed hoping her life gets better, the paradise really comes or that she won't get hurt. Bring out those points that bug her and help her see that while in other religions she may have doubts and may discuss her doubts with her peers, she can't do so within wts or she may end up talking to the elders who will tell her not to spread her doubts as she may end up being disfellowshipped for creating divisions. Freedom of thought is wonderful but she won't have that within the confines of wts. If she's a loner, this problem of discussing doubts may not become a problem but if she likes company it surely will catch up with her if she's not careful. And who want that life of not being able to discuss anything with friends - that is if they are real friends?
As for dating and beautiful married couples. Chaperones aren't always there when people date, it's not a rule but a suggestion. I never had one whenever I went out with my wife at the time and I would guess most witnesses who are dating don't have one either. Being along and dating still is not the same level of knowing one another as when people live together or sleep together. It's a fantasy to think that by just holding hands and dating the marriage will be happy because the couple held out on sex or more intimate matters until after marriage. For some that aspect of life isn't important while for others it's very important. People dating may not discuss subjects that people living together or sleeping together might as the relationship is different and it also may change after the couple does sleep together which may not be a bad thing. If the couple doesn't enjoy that intimate part with one another before marriage what will their relationship be after they marry? Also the beautiful couples at the meetings are outward appearances of happiness but the truth is known only by the couple or those close to them. The marriage problems within JWs are no different than outside of their cult if not worse. These aspects may be difficult to convey to a kid or a young adult wrapped up in a belief system telling them what is moral and right and what isn't. Young people don't have the experience that people who've been through these things have and unfortunately we were all there and we all thought we knew better -then we learned it the hard way. I wish you all the best getting your daughter to think before she joins and actually stop associating with jws but unfortunately many learn the hard way.