You actually liked Tina? I thought (as well as the rest of family) that she was one of the worst parts of the movie. You couldn't tell whether she was being so anal because she was ambitious, or if because she really, really cares about the rules.
I couldn't hear Newt half of the time, but I do think that's audio's fault, because there were times when you could see his talent shine through.
As for the movie itself, it could be very very boring. It sets up an interesting world, but the story is kind of stupid. I think the idea of following a wizarding World War II is amazing, but shoehorning Newt into it will take some plot magic.
Also, wizarding America sucks balls. Serious, what a shit place.