Good points with the Confer with Bangar achievement, I'll check those back next I play. It's still a bit odd that they'd stow such an important story element away in an optional achievement though, it makes the sudden "Primordus is awake now by the way" very jarring for players who aren't playing live, or who don't chase achieves.
And yeah I agree with Delirium, I hope we get some form of major reveal or setup for the end of Champions, we need something to build some hype again.