I haven't read anything that they were going to start putting Concussion Blow on the GCD for Warriors.
I use to love doing CB and SS for some good burst damage since CB did not use our GCD. Anyone else notice this change (I'm sure you have). I have searched the forums and haven't noticed someone pointing this out.
you want to shockwave/CB basically if you've got SS on cd, rev on cd, and you've devastated once already and still didn't proc SnB. at this point, another devastate won't speed up your next SS if it procs SnB, it just makes it free. for this reason, unless you're trying to stack your sunders up fast (beginning of boss fight), you really want to substitute the second devastate with a shockwave or CB for extra damage/threat.