I was afraid my rant pissed you off so much that you stopped replying...
Anyway I am doing the postgame stuff, I didn't even bother trying the platforming in the beach section though. What I'm stuck on now is the sliding ice puzzle on the second level of the Sky Abyss. I can't figure out how to get to the exit at the upper left.
EDIT: I figured it out, made it to the end, and beat Legion. How do I play the DLC stuff now?