Yeah, whatever people say about this anime... When SOOOO many things go over your head, it's hard to care for the series.
Can a make a recommendation? Haibane Renmei is made by the same producer, but I think it's a much better story if you ask me. At least you get to care for the characters. The series revolves around the characters.
I've seen that one actually. Though it was a couple years ago and I could probably give it a re-watch.