I would say it's still too soon to say if this "rework" isn't anything or if it is still something to be excited about. Yoshida didn't show TOO much on the live letter and admitted he doesn't know how the job plays, and they just gave us an overview of the changes.

But I would say that even if it is just a change that moves Greased Lightning from being a buff we have to maintain to a trait we always have active, and a reworking of skills that existed solely to either build, burn, or maintain that buff, that's still about as much of a rework as summoner or ninja got this expansion. Also if that is all it comes down to, I'll be glad to not be the only job to lose all my buffs when an in-fight cutscene decides to last longer than 15 seconds.

And this is good ground work to let them actually expand the job in a way they haven't been able to do for several expansions.