I saw the movie and I loved it.
I wouldn't focus too much on, what I call, "minor" details such as the ones you pointed out (elder with beard, or when the girl went out in FS in jeans). I noticed these things, too, but to an everyday "worldly" person, they wouldn't know the difference. I do kind of wonder if these types of things happen in Europe, so maybe someone can fill us in.
What IS important is the reality of what JW's go through, and this was only one example of the many thousands of stories out there. I also thought the script was well written, although there was a lot of information presented and most of it may be missed or few people would truly understand what it's like to be a JW. It's complicated being a JW, and unless you've been a part of it, it's hard to convey everything that goes along with it... especially in one movie.