One of the few things I missed in going from CM11 to AOSP and this version is working well enough to satisfy me, but I have a couple questions. I am curious about the lockscreen popups...on my N5, they don't open the app like they do in the CM11 version...specifically gmail, but I don't think it works for hangouts either. Also has another unwanted feature that the original did not...when notification shade is pulled down, the headsup notification stays and sits unattractively on top of the shade, while in the real version, the notification version takes the place of the heads up (i think it even slides into place?).
One final thing that bugs me about this version and the original. When the phone is in daydream mode, the headsup appears and when you click it, the app opens behind the daydream (i.e. it keeps showing pictures in daydream, but when you tap the screen again, it goes to the notified app).
Sorry it sounds like a total wanker, but I am mostly just curious if this is a limitation of the fact that this is an app, and not part of the OS, or if these are actual bugs?