A collection of EUIV Mechanics currently unimplemented in EUV

[PDX Ryagi]

So far I've only seen a handful of advances referenced for a handful of nations. Which leads me to believe that only a handful of nations are going to get four or five unique techs in the tech tree for them.

I think you may be slightly misunderstanding who gets what advances. Yes there are advances tied exclusively to tags (Such as the Ottomans having many), however in addition there are also advances tied to for example gov type, primary culture, religion.

So say you are playing as Wolgast (Off the top of my head I don't believe they have any tag specific advances so I'll use them as an example), you might not have "Unique techs" exactly, but you'll still have some specific advances because you are a catholic monarchy. And then on top of that there are the advances that get unlocked via Admin, Dip, or Mil focus.