This is a vanilla issue and not one I can currently fix

intuitively i feel like it would cause a lot of potential issues tho...

I love this mod but i feel like there is one major problem i find with playing Rwanda here.
The fact that Tanganyika is split between your capital region makes it nigh impossible to colonise as your population in your capital province counts against what you need to colonise it. sorry i'm not the best at wording it.
I don't really know mods very well and i don't know whether this would be possible but i think if it'd be possible to split the centralised nations into a new Rwanda province then this would solve this.

Thank you! It’s a slow process for me but there are a couple things on my to-do list.

Such a great idea, thanks Grey! Any new Africa content you have in your head is welcome!