Yeah, the positioning for some of the countries really screws them over, especially Prussia and the Confederates. In general the Comintern (European Soviets, Roma, PRRS, Persia, APR, Libertadores) seem to have it pretty easy going, so it's usually fun to try and screw them over somehow. I was going to do that in my current game as Bourbon but Prussia allied with the Ottomans and the Ottomans declared war on me in Africa because they are idiots.
And the countries that are supposed to be the Allies (USNA, Australasia, Sweden, the Cossacks, Bourbon) suck at allying, maybe they can adjust that in the next patch. Oh well. Like people are saying I guess it was made for MP, but it can make for some fun SP games too if you don't care about historicity.
Will definitely check out some of the other mods mentioned after I'm done with my current game.