R:TW never claimed to be a historically accurate game. BI isn't claiming to be a historically accurate expansion pack. Nobody is forcing you to buy the game. So I don't see what the big deal is.

If R:TW claimed to be a historically accurate game, and was released as it is, I can see a problem. Likewise, if BI was marketed as a historical accurate game and was released with major flaws in historical accuracy, I can likewise see a problem. The fact is that none of you have to buy the game if you don't want to. If the game looks too ahistorical and that really bothers you, then you don't have to buy it.

Arguing about the historical accuracy of Catholic Priests in armies is not going to accomplish anything except for raising tempers and post counts.