This looks decent but it misses a feature that I won't give up from Octal which is Apollo-like swipe left->right anywhere to go back (and reverse to drill back into the story you were on, which Octal doesn't support).
Other than that I do appreciate the reader settings and this is one of the better ones. Most are just readers — this allows logging in.
Another thing, editing of comments is a bit odd. It said a comment was updated but wasn’t? Logged into the site and didn’t see the change.
The feature is also present in HACK! It's called "Full screen swipe to go back" (you really need to search for it, the settings list is kind of messy). Also the reverse you mentioned is implemented.
I like Hack's notification replies and showing karma for comments you wrote. The UI just feels too tight to me and I can't quite explain it, it's just harder for me determine where one comment starts/stops/indention/etc. Maybe I could fiddle with the settings enough to get it to where I want but Octal had almost everything I wanted out of the box and I didn't need to fiddle with settings as much.