Fanatic and Zealot should return back to Barbarian in my oppinion. Soldier is already a very strong keyword with pretty good aggressive and cheap cards. Also it's almost every time combined with Holy and there is already the card
Guardian Angel that deals damage based on # of Holy and Soldier cards on hand.
On the other hand Barbarian is an average keyword (damages wall, but almost every time I manage to bring down the wall already by myself without using the keyword before I manage to fill up the counter), with moderately good aggressive cards that are either cheap but innefficient or expensive and really good. Fanatic and Zealot where the combination that made the Barbarian keyword so good. Now, in my opinion, Barbarian is way underpowered in relation to Soldier.
Furthermore, as I mentioned Soldier and Holy are always combined and a lot of cards have both keywords. Now Zealot will be way too strong (potential damage = 10 +3*8*2 = 10 + 48 = 58 damage for 11G 15R. This damage is now more likely to reach the maximum damage as there are 6 cards that have both Holy and Soldier keywords)