Regarding mobile,while I've found reading the actual articles is easier, I've noticed these issues on my nexus 7:
-sometimes the hot topic / most discussed is blank.
-often tapping the article to show comments does nothing. Eventually after tapping all over the place the stars eventually align and the article loads.
-there should be an interface option to load all comments. Accidently moving back to the main site loses your progress in the comments and it's frustrating having to go through and load comments every. single. time.
-often the 'load more comments' button doesn't do anything
-moderation was supremely broken last time I tried it on mobile.
-scrolling is painfully slow. View desktop mode works fine.
For the main site: fire the UI person responsible for removing the 'read more' button at the bottom of the summaries and put that damn button back where it belongs. Also, quite often I see the title going under other objects on the page.