If Balance existed and you take out the only variable in the equation, the player, then all matches would end in a draw regardless of group makeup. For instance, 8 dps vs 6 dps and 2 healers, the 6 dps would kill each other leaving the two healers and dps of the opposing teams forever locked in combat.
The question to be asking should not be about what people think balance should be but what kind of game they want. A DPS race where the only roles viable for a team's success is dps with various strategies to slow the opposing team's progress towards the objectives, where deaths of characters are more frequent and fights last a few seconds, or promoting diversity of roles in a group.
Pre 1.2 pvp groups were diverse with different class roles. I will admit healers had it easy. 50/50 from l2p issues and healing crits being uber, but healers were and will always be the minority. DPSers had the same mentality that healers have now, "If I am unable to do the role that my class is suppose to do, then why bother playing this role?".
No matter of "balancing" will change this one side always gets the shaft and in these cases it is the minority.
So the only question to ask is what kind of pvp scene you would like to play and suck it up. DPS race with quick fights, lots of death and button mashing potential with less emphasis on teamwork, becoming which team can kill faster. OR longer fights with more emphasis on teamwork and role divserity, requiring more strategies and tactics to change on the fly (Depending on what kind of team you are facing) while sucking up the knowledge knowing that you may face a stacked team.
IMO I like fights where battles last as long as pre 1.2, where victory hinged on someone making a mistake and the opposing team taking advantage of that mistake, not the killfest it has become where victory hinges on who hits harder. No game is perfect and will make everyone happy.