One of the (many) reasons DH 2 ranks as the second best Potter film in my book is because it communicates much of its plot through visuals. It is a very visual film with less dialogue than the previous films, which sadly means that some Potter fans write it off as an effect show with less depth just because it took out some of their precious dialogue and replaced it with clever symbolism. Bane's insightful analysis of the tower jump scene shows how action and depth can go hand in hand. It took me a while to appreciate it too, but when I was able to, it opened up doors to more depth as it had already made me associate it with horror concepts. And best of all, I don't think we are looking too much into it. Not when compared to other films that are more recognized amongst cinephiles. There is no doubt that Harry Potter and director David Yates deserve that kind of respect too.
To get the ball rolling, I think it's the sort of film that grows on you (at least film fans that happen to like HP) because it doesn't spood-feed the audience with explanations, but uses visuals and subtle points to communicate them. A concept from the book like Harry being the master of death for instance is kept not through the dialogue, but through his actions (snapping the wand in half, dropping the stone, jumping fearlessly into the abyss), which is what being master of death is about the way I interpreted it as someone who accepts death. Likewise, Olivander's comment at the beginning of the film that owning all the hallows makes you master of death implies that is the reason why Harry survived the killing curse once again. And likewise, viewers may come to the conclusion that The Elder Wand couldn't kill its own master. Admittedly, I do think the film should have made that point clearer just by adding one sentence of dialogue at the end, but that's not what I want to discuss here. It's ideas like these conveyed through the visuals that the audience can pick up on a second or third viewing and thus appreciate the film even more for respecting their intelligence and being sophisticated.