We'll agree to disagree. However, I agree that we shouldn't have a character like Kreia in K3, but for an entirely different reason than yours. I simply don't want it to seem like K3 is immitating K2 at all and want it to bring something new and innovative of its own to the KOTOR series.
That's the same reason I don't want Revan as the protagonist, the same reason I don't want the Exile as the protagonist, and the same reason I want none of the party members (except the two droids) to return to the party.