First flaw: They needed to spend more screentime depicting Strange's learning of magic at the very beginning. They needed to specify that he spent 2 or 3 YEARS learning magic, and they needed to depict more struggle from his part to learn the magic anyway. Second flaw: Before the GENIUS and even groundbreaking resolution of the events, I wanted 2 or 3 additional fight scenes of Strange vs. Hannibal. Just my opinion. Other than that, this is the best MCU screenplay to date, devoided of the usual and terrible MCU clichés and predictable/boring character development, and it was VISIONARY to the nth degree.