I don't believe I'll be revealing any plot points, but after sleeping on it, my only complaints about Rozen Maiden: Träumend are the same I have with most anime.
- Because the funding is iffy, the writers write their plots on the fly keeping the main points and creating many little inconsistencies in the minor details. The more minor details they mess up, the more the story loses credibility even though it may remain true to the main storyline.
- The more you mess up, the more retcom you have to do in future stories to correct the inconsistencies.
- Japanese anime does not hesitate to use Christian symbols and churches as locales, but their understanding of the worldview is incredibly naive. In Rozen Maiden: Träumend, Christianity is used more as a gothic symbol of death.
- A caricature of English romance literature is having the two people stare at each others eyes and repeat their names. That happens a lot of times in anime and a lot in Rozen Maiden: Träumend. If you cut out every scene where Jun and Shinku repeat each others names back and forth to convey emotion (despair, affection, apology, etc.) as well as the other characters, the entire anime would have been an entire episode shorter.
- If you are going to have major characters die, their death has got to mean something and can't be wiped away by mere platitudes that are given as shallow and unconvincing explanations. Yes, it's anime, but if you are going to address the big topics (fate, death, responsibility, purpose), you had better come up with some substantial answers other than a shallow paradigm that's 3,000 miles wide and only 3 inches deep.
All in all, I do not feel I wasted my time watching Rozen Maiden: Träumend and I would recommend it to everyone who is interested. Just be aware that though I found the anime to be outstanding, it isn't perfect.