Considering the amount of players absolutely SCREAMING across several forums about their non-crit ws jobs being left behind and being outdamaged by a thf or a nin, I'd say it's extremely likely that this is indeed a crit nerf. But at this point it's all speculation and I'm not going to get upset about it until we get more information or we find out for ourselves after the update.

However I would also appreciate it if a Rep would be so kind and give us a little more specific info about this adjustment.