I have all three tanks level 70 and all three are 315+ (depending if I farmed 320 weapon for the job or not)
drk was the weakest tank both in mitigation and dps before the update.
I felt pld was too strong as dps, and I thought war was fine.
Removing the stance swap penalty was a bad idea. War can already pop out 6+ fell cleave, the stance penalty was helping to keep them in check. War didn't need an adjustment, people just cried because it wasn't OP anymore. Now it will be OP again.
Pld "nerf" will barely be noticeable.
Adding 20 potency to souleater won't really be noticeable either. Drk's biggest problem was mitigation
