Yes they have, but still not great...our northern arctic vortmax has come onshore in AK from the Chukchi sea and the "southern stream" (which is really the PJ piece) is still south of the eastern Aleutians, but that's a better area than it was before.
However, there's many more variables in here that may not be figured out until closer....the blocking to the north of the PV is one....the handling of the PV itself is another with all those spokes of energy rotating around it and stretching it in various directions. A lot of that stuff is in relatively poor data regions and will stay like that. In my experience, I've found that models tend to handle winter threats a lot worse when we're in this sort of fast flow Nina pattern but with blocking up north causing a meridional flow.