Would you ladies change the name you have had picked out for years if it all the sudden became trendy when you finally wanted to use it?
Honestly? Yes. That might not be a popular opinion on this board (I really don't know), but I just can't stand the idea of my kid having a trendy/time-stamped name. But, other people don't feel so strongly about it. Only you can say if it will bother you to the point of moving on from the name.
I do think Hadley is trendy and I don't care for it at all. However, it's worlds better than some other trendy ones out there (Kinley, Kaylee, etc).