Don't see why they can't just give warrior a silence on the GCD with a short cooldown. Then pld would have a stun on a short cd on the GCD and a silence with a long cd off the gcd and warrior would have a stun off the gcd with a long cooldown and a silence on the GCD with a short cooldown. Then utility wise they'd be pretty even. Then make warrior stun 20s and pld silence 20s and brd silence 20s.
