I think Disney is making adjustments to the plan based on how it has been used since it was introduced.
Regular Dining: Including the ap, entree, dessert, and tip in the original (although we LOVED it) was probably giving away too much according to the accountants.
Getting rid of the ap and not including tip allowed them to keep the same price for the plan without giving so much away.
The intro of the QS plan gave more options but took away from people that would have purchased the Dining Plan.
I really think Disney did not realize the overwhelming popularity the public would have for the Dining Plan from the beginning. Offering free dining gets people "hooked" and the next trip they will probably purchase.
They are coming close to pricing themselves out of the market IMO. We will just go off site or stay on site but reduce the TS and pay OOP.