Latest update contains changes to Ranked All Pick, adds minimap UI scan ability, new items, and balance adjustments.
Changes to Ranked All Pick allows a 15 second voting phase to ban heroes before the picking phase begins. Each player votes for a different hero then half of the heroes that were voted on will be randomly selected and banned.
Each team now has a Scan ability, available on the minimap UI and there have also been changes made to starting HP, hero base mana increased from 0 to 50, and HP per strength has been increased.
Head on over to the Dota 2 blog for full details of all changes in this update.