I have the Reverb G2 as well and I'll provide a few comments on my experience.
I start in persistent mode in 2D, but I have a button on my yoke that's assigned to put me in the Pilot's seat so I use that and then once my framerate has settled I start VR.
I find that if I give the sim a moment to settle after I start VR then the stuttering resolves and the framerate is reasonably stable.