Sounds like they are borrowing from DC Universe Online, which can only be a good thing. Basically DCUO "roles" similar to SWTOR, but as it is a superhero MMO, not everyone wants to "Tank" or Heal". All character's have a Primary role as a Tank, Healer, or Controller, and can always switch to a DPS role as well. Many players prefer to stay in DPS mode, and it is not uncommon to run instanced combat with mainly DPS characters.
What I suspect SWTOR is specifically borrowing from SWTOR, is the mechanic that buffs the characters, if a role is lacking within the party. For example, if you don't have a healer, all in combat regeneration is increased. It might be slightly harder to do the flashpoint, but a good group of players will be able to punch through it.
I can't wait for it!