Province Ideas?

Alright, So I had a couple suggestions for provinces or something that could be added to them. Whatever you want to call it, anyway, I would like to suggest a couple things that I think would make province things cooler. Alright, Here we go!

-Annexing Provinces-

Alright, So, Annexing provinces! What I mean by this is that when you capture a province, you can't immediately start building things. You can only build infrastructure, UNTIL, you build something called, like, "Annex Province". When you build that annex, you can build on that province like a regular province.

-Nuclear Weapons Effect-

Alright, So my idea is when you nuke a province, there is "Nuclear Fallout" affecting that province, preventing anything from being built until A. You clear out the fallout or B. After a few days the effect stops and you can build there. This effect would also lower the health of any unit stationed in that province. (Maybe -5 HP per day they are there?)

I'll add to this as I think of more ideas, so Idk.