Yeah, I've heard a lot of people say that about the support classes. They did a really good job of making those heroes fun to play.
There was a great 3-part video series (~60 mins in total) just last month with Blizzard (lots of Kaplan and Metzen) talking about Titan and how Overwatch grew out of it. Their roots were in FPS shooters back in the day and you really get the sense that these guys know and love the FPS genre.
http://www.gamespot.com/articles/fro.../1100-6439150/