Sam: WADR to them, that is not pashut pshat in the rambam. I think most people would read it as refering to yemos hamashiach. After all, it was taken a third time after bar kochva.
So they may be correct, but the authority is only as good as them, not as good as rambam.
Also, maybe rav herzog thought it was yemos hamashiach, in which case there is no authority at all (bec rav shachter is only saying it bec rav herzog did)