People will still choose the best combination, i.e.

Tanks will have to have Provoke, Convalesence, Flash...
Healers will have to have Swiftcast, Stoneskin, Protect....
DPS will still have to have Blood for Blood, Internal Release, Second Wind...

The prospect of more choices is good but only on paper. In practical, the most wild combination won't contribute to the raids (and that's what the game is centered around) it will probably won't be implemented any time soon.

Sorry, OP but I would also like to have Life Surge on my WAR (dat Critical self-heal on Fell Cleave...) I don't think it happen with the current state of the game.