Ya lets cater to more mouth breather and window lickers.

There are enough tanks and healers, the proportion of tanks/healers you need in coil is the same proportion of tanks/healers you need for four man, making any changes will offset the balance when it comes to raiding.

why not just remove the roles, make everyone tank/dps and heals, OH WAIT YOU CAN ALREADY DO THAT, but people still want to dps.