Would be a little weird if the WG left Vegapunk alone, unchecked...
Seriously though, it would be great if there wasn't an actual "traitor" but rather Punk Records has become self aware, and is now trying to eliminate the only thing that threatens its existence, and keeps it from being 100 percent self reliant, which would be the Vegapunk's. Or if it was trying to absorb all the Vegapunk's consciousness' and become the one true "brain" so to speak. Maybe that's where the Stella disappeared to. To Punk Records. Doubt that's a route Oda would go though.
As for it being a "boring" subplot, I don't know if that's what one should call it, as right now it's barely even a subplot. Just a strong speculation. It's taken up nothing but a panel or two at the moment. Not like there is really much to go on in terms of development and panel space. How can something that's barely a blip on the radar, be boring?