Apparently so. It must have come back during the one of the recent beta patches.
It's a damn nuisance, I tell you. Half my vassals are feudal now, including three of my sons.
You know, I specifically worked hard to settle my nomads as a tribe so I could become a republic in the last province of the Silk Road as it empties into the Black Sea, and my idiot sons and vassals act stupid.
Why are they acting stupid? From their perspective, it is "All power for myself!" Vs. "Sharing power with others". Very few rulers supported Republicanism if they didn't need to.
But I do think that the ruler should somehow be able to force non-theocratic vassals into his Government Type.
In any case, this should be part of its own topic.