Personally, I liked her outfit. If for a date Eliza wants to dress in a manner that makes her feel attractive and she thinks I'll find sexy, I'm all for it. If some other guy (or gal) happens to see a brief flash of a little more than they should, then whatever; they can be jealous that's all they'll ever get.
P.S. If a girl tries to dress sexy for a date, and you tell her she should go change because she looks like a slut, that is likely a date and possibly relationship that will abruptly end. Unless she likes being called a slut, I suppose.