+1
This is a really idiotic decision. Why even sell customization DLCs to people if you are going to put absurd restrictions on it? It is my game, it is my custom nation, I will play in whatever way I like it to be. If I want 10 OPM nations bordering me, that is my business.
Putting stupid blocks in gameplay because someone cried 'nerf' is a really poor thing to do. Don't fix what is not broken. Besides, how is it even 'unbalanced' in any way? It is the player's wish if he wants to play the game in his own way.
Forcing him to go on the route arbitrarily decided by some dev sitting in the office is a bad move.