Having a really frustrating game as the USA, one of the biggest drawbacks to this arbitrary idea is its global nature, why is a Prussia repeatedly smashed up in wars that utterly loves and adores me totally opposed to allying with me just because they have 1 "GP" ally already? We have literally zero conflicts of interest, we only have mutual enemies that have attacked us both separately so again; why do they prefer for no good reason to be cut down and destroyed over and over rather than ally with me? It makes no sense, this entire idea is frankly poorly thought out and silly and if we're going to have it at all it should be based on regions/continents.
Prussia, Britain, Austria, Denmark and other random nations that become GPs for a month or so (still confused by that) all love me because of our shared rivals/enemies and because I as the USA have only got border issues with 2 Spanish colonies, the others either have no American colonies at all or a bare tiny handful in South America, we all hate Spain because they're insanely godly powerful yet not one of them will ally with me for no reason other than this arbitrary factor which actually makes AI nations look stupid because they essentially choose voluntary suicide despite them and me both being 100% in favour of allying when the GP ally factor is disregarded.
It's also my experience that often the nature of the game pre-determining most great powers and their positions and situations with each other will probably always lead to one or some great powers being locked out of allying with other great powers and other friendly nations.
Prussia, Britain, Austria, Denmark and other random nations that become GPs for a month or so (still confused by that) all love me because of our shared rivals/enemies and because I as the USA have only got border issues with 2 Spanish colonies, the others either have no American colonies at all or a bare tiny handful in South America, we all hate Spain because they're insanely godly powerful yet not one of them will ally with me for no reason other than this arbitrary factor which actually makes AI nations look stupid because they essentially choose voluntary suicide despite them and me both being 100% in favour of allying when the GP ally factor is disregarded.
It's also my experience that often the nature of the game pre-determining most great powers and their positions and situations with each other will probably always lead to one or some great powers being locked out of allying with other great powers and other friendly nations.