If you mean configChanges, I would strongly recommend against it because it is a bad practice and it probably wouldn't work in this case anyway (no activity recreation = no multi-panel layout on a 7-inch landscape screen).
3) Opening the comments of an article in portrait mode and then going landscape on the Nexus 7 crashes the app completely (presumably due to the multi-panel mode in sw600dp+ screens?)
1) The article list scrolling position is reset.
2) On my Nexus 7, going from landscape to portrait while viewing comments closes the comments.