Ouch!
Although I understand Disney's desire to attract families and children to their eating establishments, this just sounds like a short-sighted idea. The Harambe area of AK is very authentic and very nicely themed, and Tusker House added to this theme. Moreover, there are very few dining choices in AK, why exclude a portion of your guests from an entire restaurant because they either do not want a character experience or a buffet meal?
If this rumor is true, those not wishing to be "over-characterized" will be forced to choose among only limited choices - Pizzafari, Flametree or the very over-priced and mediocre Rain Forest. Maybe the construction of the new dinosaur-themed sit-down restaurant is fueling this, but Tusker House is unique and provided a great alternative to the above.