The only problem i see with this type of class in balancing in pvp, it would be too overpowered making a class do damage and gain combo points to use to heal themselves after they gained enough points... oh wait, i think they just did that with rogues <:S
I dont want to sound like a troll on most of these ideas, but I just feel that many of them are concepts that have existed for the current classes at one point or another and have been removed for just reasons, srry if i sound a bit rude because of it.