I like the scaling. It makes it handy when you're zoomed out to have nice big characters to easily keep track of everything, and it makes the world seem all the bigger when you zoom in and realize you're not a titan, just a dude in a field surrounded by wolves and trolls.
Perhaps various types could have a threshold set where at a certain point they'll stop scaling - like Ogres, for example. Maybe they stop getting smaller halfway to the point that humans do, so that no matter what they'll always appear towering over you. It would sort of give a curved-scale effect when zooming out, too...as it would seem like the huge creatures simply zoom slower, and humans zoom faster, to reach their pewter counterparts. That may also be entirely too complicated and not worth anybody's time.
So: Scaling get's my vote