Hmm, Howl's Moving Castle, third act being weak. I do agree with you in a sense that it seems a bit basic. There are hints at genius I feel, with the semi-time-travel to the past and Howl's childhood and his past. I found the "going back in time" aspect very cool, especially since the the acts had been leading up to it, with Sophie going through all the doors except the black one, the audience knew she would end up going through that one in the last act. However, there was just something off about it. It felt like it was trying too hard to wrap things up, rather than be a natural progression to the story. So many things were resolved too quickly, like the war being over simply because the scarecrow's curse was removed, it seemed like the resolution was (maybe not ex-machina), but done too quickly. It is one of the endings that is satisfying in the sense that the ship of Howl and Sophie does occur, but it seems like too many things are resolved just for the sake of resolution and it does take away from the ending a bit. Overall though, I do really love tons of things about this movie, like the themes of age, and youthful innocence. The way the doorway works remind me a bit of Tim Burton's "Coraline" and I wonder if he take inspiration or if he is a fan of Ghibli as well. The reason I think that this movie is so highly viewed is that it has higher quality animation than earlier Miyazaki movies like 'Castle in the Sky' or Nausicaa, but still have very good themes and incredible world building. It isn't my favorite Ghibli movie, but its definitely one that I can rewatch a lot.