I received a survey from Disney about the dining options at SSR and it pointedly asked that IF a full service restaurant was added to SSR what type of food/menu would be preferable, so I would say they are at least considering the idea.
IMHO they need to have that option. In an upscale resort people expect to have a dining option on site. I understand the argument that DTD is just a (not that) short walk away and that there are busses and ferries to the DTD area BUT for a guest that comes back to the resort and wants to feed their hungry (and usually crotchetty) family reasonably quickly, a 30 minutes journey to DTD followed by whatever wait they are faced with at the DTD restaurants ( it's rare to walk into any of them in the evening) isn't a viable option and for many people neither is a food court. From leaving room to getting something to eat I would think a MINIMUM time lag is going to be an hour, more usually you'd be looking at 90 minutes + . Most of the time that is workable, but if that timescale is not workable to a family staying at SSR, then you are in trouble because you have no other options than the food court. If I'm paying $250+ a night for a room or $15k + for a timeshare investment I expect to have more options than a food court and I expect so do a lot of other people. JMHO.
People may not choose to use a full service restaurant while they are staying there, but for many people the fact that there is that option available to them should they need it will mean they will choose to stay at ( or buy DVC points at) the resort. IMHO just having the food court there ( and it's probably the nicest food court I've visited) is a major drawback to the resort.