No you don't.So you weaken fighters and Monks in tier 2 to be more in line with Clerics and Druids and now all 4 of them are weaker than Wizards and Sorcerers
Like I said before, the Barbarian, Fighters, and Monks (I'll use the Playtest term Warrior Group) are balanced with Priests at tiers 1&2.
Warriors have the best damage
Priests have the best support.
Experts have the best skills.
And all 3 are decent in the skills and damage that they don't have Group specialization in.
It's the Mages who are off in Tier 2+ due to being able to nova in short days.
The solution is very easy.
Tier 2.
Warriors get a damage feature
Priests get a support.feature
Experts get a skill feature
Mages get nothing.
Tier 3 & 4
Determine if you are going for more specialization or versatility
Specialization?
Warriors get 2 damage features and a defense feature
Priests get 3 support.features
Experts get 3 skill features
Mages get nothing.
Versatility?
Warriors, Priests, Experts get 3 bonus feats
Mages get nothing