Over the last few updates we've been seeing some pretty major adjustments to the support role. Every team needs a solid roam in their game because they are often the ones making the plays and setting the tone for the game.
With the ban on Krul during the Evil8 tournament, we saw the raise of Adagio as a roam and carry. His healing and ability to buff up your allies can make a huge difference in team fights.
Unlike other support where you want to be in the middle of the fights tanking as much damage as possible, it's a good idea in team fights to try and stay in the back line. In the back you'll be able to offer more for your team because the longer you can stay alive, the longer you can help your allies stay alive.