The update includes:

• The Tech expansion (which is the first of the High Alert packs)
• Some big changes to the online lobby layout
• The New Game screens have been combined into 1, with tabs for normal ranked games, and challenges.
• We have the new “community feed” feature, where notable events by players are posted.  (Right now those are just tournament wins and 6-win arena runs.)  If you don’t want to see community feed items from everyone, there is a checkbox in Settings to limit the feed to just the people in your Favorites list.
• We added the “Attack” button that was first introduced in Hero Realms