Originally Posted by Mandalore5
Physically, yes, he was unable to operate, but it was stated that he could mentally influence the actions of Vitiate during that time, so still had power even in that state.
So who do you call more powerful. The slave who can slightly influence the thoughts of the one who slaved him, or the slaver who is still up and moving around like the bad-ass Sith emporer he was?
As much as Revan could influence, he was still rendered in a physically vegetative state by the Sith Emporer. Mentally, he was caged inside his own head with limited abilities to get into Vitiate's head, and only Vitiate. There was no ability to contact the outside world. Even being in prison on Hoth would be more of an existence then being a bug in the back of Vitiate's mind.
The very existence of flamethrowers proves that some time, somewhere, someone said to themselves, "You know, I want to set those people over there on fire, but I'm just not close enough to get the job done." -George Carlin