Do not add additional specializations to balance. Do not add new classes to balance.
Remove one of the Mage specializations (arcane is the least popular, so remove arcane) and implement a Chronomancer healing class.
Remove Elemental or Enhancement and replace it with an Elementalist tank specialization.
Remove Survival and replace it with a Medic healer.
Do not add a Necromancer. Make one of the DK’s specializations a Necromancer caster specialization.
Remove a rogue specialization and replace it with an evasion tank centered around mobility and avoiding damage.
I’ll let you guys get creative with Warlocks.
This way we aren’t seeing an endless stream of new additions for the balance team to struggle with and inevitably neglect due to difficulty with sheer volume of specializations.