Berghain's door policy mostly still works: keeps the American tourists out and the club good times. It's starting to feel a bit dated in general, like the moment's moving past it, but it's always a good time.
I agree, as ruthless as the door policy is every single time I've been there I had a good time, the crowd inside knew what they were there for and what the scene is about.
To me personally since the big room/celebrity techno DJs took more space in the scene it has become much harder to find dancefloors like Berghain. I'm still sad for De School closing in Amsterdam, it was a very different place than Berghain but the crowd and dancefloors were very enjoyable.