That final battle
In the book series, Harry’s final confrontation with Voldemort happens in front of an entire audience. The ramifications of the Elder wand are clear: Voldemort is reduced to the Tom Riddle nothing he was before his quest for power began and dies. In the film, it takes place separate from the group, over several locations, and with lots of flashy lights and graphics before Voldemort turns to dust. It’s a weird choice for the adaptation and minimizes the actual battle, but at least it looked cool?