Maximilian Mayo-Dell reflects on improvements from a preliminary task to a full thriller film opening. Key areas of growth include skills with equipment, framing shots professionally, using lighting and white balance effectively, improved pre-production with storyboards and location selection, allowing enough time for proper production and multiple takes, incorporating useful props, coaching actors, and advanced editing with sound and titles. Overall, the thriller opening was much more polished and tense compared to the preliminary task due to these lessons learned.