I haven't played the demo yet, so forgive me if I'm wrong, but I believe the game currently limits you to one of each type of advisor. Rather than getting rid of the distinction between the different types of points entirely, why not just allow you to have three advisors of the same type? Then people who really want to focus on an area can use an already established system to do so, while still somewhat falling behind in other areas. Hypothetically, a very rich nation could get +9 to a single MP pool just by using advisors, but even at the beginning of the game you could get +3 or +4 to a single pool cheaply instead of needing to pay through the nose to only get a +3.