I'm seeing the same issues here, I've lowered my graphics settings now from ultra which I used in the private beta down to medium and the issue has become less prevalent but is still happening.
I've been monitoring my system using NZXT Cam and can see a corresponding drop in GPU utilisation each time the stuttering occurs
EDIT: DONT USE RIVA TUNER TO LIMIT FPS , In game one does a lot better job and uses less cpu power. I did the same thing in private beta and now i forgot to exclude open beta thedivision 2.exe from it. Game is now much smoother with no microstutter at all, just like in private beta. If you have 4 core CPU with no threads this is obligatory. Have fun everyone!