Hello,
having enough mat zones would be great! I'm always a bit annoyed with commerical models,
they often use a single material for walls, ceiling, floor, and lots of extra detail.
Sure that can be worked around with a blend node, but it is just much more complex
to exchange all channels of a material, for example to try only a new wall texture.

With the UV scale, I think there is no standard. It would be great to have a unified scale
for UVs (1 foot, 1 meter, whatever), but often it depends on the size of the model.
UV values > 1 are not established and some programs may not work with them.

A PM:UVscale node could be of big benefit here.

Best regards,
   Michael