If it is "medieval" in the RW European sense... then
Steel must be cutted off from the metallurgy skills... as in this:
"In the early 17th century, ironworkers in western Europe had found a means (called cementation) to carburize wrought iron. Wrought iron bars and charcoal were packed into stone boxes, then held at a red heat for up to a week. During this time, carbon diffused into the iron, producing a product called cement steel or blister steel"
Thus Before the 1610s any process of making steel was unknown on Europe.
Also, with the medieval knowledge on engineering and architeture, making something like the Temple of Laanx or like the Eagle Fortress at the Bronze Doors would be impossible... so they must be cutted down too.
Also the Xachas must be cutted down... their culture is too scientifical for a medieval world!
And of course... the political system is too complex and far from Feudalism to be medieval (Octarchy instead of Monarchy and indirect elections)... so just put a king in the place of the Octarchs and several feudal lords controlling the levels and warring against them!
I think PS should only keep a medieval style, but should not enforce excessively it... This is another world and a fantasy game... not a realistic representation of medieval Europe...
And it would require several changes on its history to make it more "realistic" to medieval times... so it is a major waste of time to do it and it would break the original Planeshift setting apart...
.... Back on topic
Those weird characters really make my day, they add some colour to the RP and make things more interesting... but I do not think they would simply annoy around without any consequences...