Please continue bringing up AST and SCH issues.

[Ceasaria]

And thats why we are never getting a fourth healer xD

In fact, they should have released a 4th healer instead of another dps.
Why ?
Because like they said for tank, 3 is not a good number for balance. Without GBN, imagine balance now 3 tanks for Main and Off spot. It would have been more difficult (but less than for healers).
The mistake of SE was to think that going for one direction "Pure" for every healer instead of doing 2 directions (like it was in the past) "Pure" and "Shield" was the right solution.
Having WHM/AST as Pure and SCH/4th healer as Shield is easier to balance and most importantly avoid to gut the identity, kit and fun of every job.
This direction we are in now, has maybe begun with the apparition of AST doing both Pure/Shield aspect.
They need to erase Nocturnal Stance (which didn't work for 4 years !) to move on !