Well, let's talk about what we know, first.
What is the main job of a rogue (on this server)? DPS. The only other role they play is for CoH bitch due to SoS.
What is the main focus of rogue disciplines currently? DPS.
In the form of a discipline, does a 3k rune every 10 minutes on a rogue add anything to their main focus? No. Does it give them added survivability? Hardly. Maybe a 10k rune would, but one or two good rampage rounds in ST / Air will still knock that off. One round of rampage doesn't mean much on a 5 - 10 minute fight.
Is the illusion way cool? Hell yes.
Would the rogues benefit from a dps focused discipline more? Yes. Would it be necessary to give rogues more dps? Probably not.
So what are rogues missing, then?
This is probably the question we need to answer first before we talk about where to take the discipline. I wish I had an answer at the moment, but I don't. Perhaps some of the more veteran rogues have a viable solution.
Edit: It was also mentioned previously to give rogues a discipline that allowed all of their hate while the disc is active to be transferred to the target's target (the tank). This has two benefits. It would slow the hate production of the rogue, and it would also give the tank more hate than they can generate on their own. This would be handy for the SK's and Paladins to help build aggro.