Test screenings, test audiences, business men meddling, rewrites and reshoots are nothing else than unprofessional behaviours that should stop as soon as possible, they only serve to make movies worse most of the time.
Having said that, this movie was doomed from the start because the very approach towards it was wrong, nothing could had made it decent except making a completely different movie, even the first half of the movie that is not completely bad is very choppy and mediocre.