Scrapping ads and lowering prices would make a difference for me. I don't go to the theater anymore and a large part of it is because it is insulting to pay prices that high then also have to sit through ads
I also wouldn't mind previews to be scrapped. I can watch previews whenever I want, but fitting a movie in my schedule when I can't just look at a real start time on the website is part of the problem.
In my experience it makes them give me an essay instead of 10 lines of bullet points and I have you spend an hour asking questions to whittle it down to 10 lines of a bullet points