I am missing your point then.
If Kings think that Reke is their franchise guy, they will and should pay the money.
At the moment, nobody on the roster is even close to that, and, I will repeat again, what other franchise/potential franchise guy you think Kings can get for less than 12 mil?
That is not tied to whether he is a pure PG, SG, SF or whatever unnecessary labeling is used on him. I think you are overvaluing defined position a bit.
edit: actually, reread your post, we seems to agree on the point but disagree regarding Reke's level