See, roles have been around since the beginning of the game. People are complaining that they're "removing roles", but that's not possible. What they're doing is not making them so tied in to the class. Even in 4e, you could play a Fighter that was closer to a Striker, with high Strength and ignoring Wisdom and marking special abilities. There's no difference in the way they'll do it now, there just won't be any abilities that force you into a role. That's the whole point; they'll explain what the roles are, and how to make a character that can be a "Defender" or a "Striker"... but it sounds to me like they're going to make it easier for anybody to take on those roles, instead of requiring you to play a certain class and a certain playstyle in order to do it.
You can't remove roles, because people will always fall into those niches. Even back in 3.5, we had people looking at everybody else's characters, making sure we had a "tanky guy" and a "healer" and a "kill-things-really-fast type". I see no problem with broadening the ways to do this while keeping things open for people that might not want to conform so closely. I mean, we all remember the guy that kept playing Bards that didn't do much of any one thing, but helped a little in every area. What's so wrong with that?