Would be cool to have a button that says "comment" or "respond" or something that opens the browser at that url's comment section, so I can continue there. I'm logged in on the browser anyway.
Interesting idea! I think it might be a frustrating user experience because you either completely browse and post on the web browser or do it from the app. Doing it in between may not be a smooth experience.
I wish the official APIs support account login. I would have implemented it already.