Technically, you are required to comply with an FA's instruction while on the plane. Even with the new electronic device policies, it ultimately comes down to complying with FA instructions. So you were correct not to get combative with her saying that she was in the wrong.

Now that certainly doesn't excuse what seems to be rude behavior. You should absolutely report this to US, and just state the facts. They'll investigate the matter to determine if the FA needs to be advised of the recent changes, or requires any further attitude adjustment. You're doing the rest of us a disservice if you let her off the hook just because you're still waiting for her to reply to your Missed Connection on Craigslist.