Bard looks amazing, there are so many possibilities with his E and R. I can't wait to see him in pro games!
DJ Sona is out, revive has been removed from the game, smite range reduced vs champions, improved camera options ("semi-locked" mode), and a bunch more.
A new jungle tank item called Cinderhulk and Gromp changes that help with clearing. These are the first of many changes Riot have been talking about.
His win rate has dropped to the worst of all mid laners.
Check out what the skin looks like on the PBE here.
That's one long tunnel.