Do YOU think we'll get a new Tank and/or Healer in 4.0? And vice versa.

[Pells]

We have 3 healers, 3 tanks and 7 DPS. The typical party set up is one tank, one healer, one DPS.

The typical party setup is one tank, one healer, two dps. So to use that as a balance, it should be 3 tanks, 3 healers, 6 dps. We're not short on dps classes.

But having another tank or healer will only be a temporary fix to the choronic shortage for them, the same as before when Heavensward launched.

That said, there are different types of dps: melee, ranged, and magic. We don't have that yet with tanks and healers, so the 1:1:2 ratio doesn't necessarily have to be enforced as far as having different classes go.
Personally I'd like to see another ranged dps class. One who isn't a 'support' type.