In roleplaying terms, everyone in the ruling/aristocratic classes knows that a war has to come someday...politics is all about outmaneuvering the opposition and setting oneself up for victory.
And if you are competent enough and cuning, outmaeuvre the oposition and take him out with various ways, without a single drop of blood....can you do that in R2, where the internal politics is a big part of the game?

In practice, however, the real problem with politics isn't that CW is inevitable anyway, but rather that the CW itself just isn't that big a deal.
Yes and also its fullish i think the possitioning of the total rebel force in one settlementand i hope CA doesnt just solve the problem by make them imune to food shortages, xaxa!!
Civil War needs to be a bigger threat...and if poorly timed, there should be a real possibility that the player can lose the campaign. If this was the case, then even with CW inevitability, politics would be intensely interesting.
If this can be fixed then the same could applied for the campaign/battle AI in general, eventhough the AI is greately improved after patch 5 at least in legendary.
But i think that the only TW game where the AI could truly beat the human player in the single player was STW, so im not expecting this kind of improvement.
All that said, I too would like to see politics continue after CW, if for no other reason than I'd like to continue with political promotions for my characters;
If thats the case, then we dont need a whole internal policy asspect, there could be just a political promotion choice in the traits and houshold menu.

Anyway, perchaps im getting old and looks like im complaining no mater what, dont misunderstand me, im geting in love with R2, after p5 and i believe it will get better and better with future patches and DLCs.