I am all for a counter service/quick service option at Kidani. This past trip we probably wouldn't have used it very much. We were finishing up our year with an AP and had the TIW, so we did more TS meals this time than we probably will in the future, and therefore we did more meals in the room to offset. Also, everyone was hungry at different times due to timing and amount of food at TS, so it was easier to have a lot of choices in the fridge.
However, when we stayed at Jambo over New Year's, we ate at Mara probably 4 or 5 times because we didn't have but a couple of TS meals planned. When we return to Kidani, we probably will do fewer TS meals next time, and a QS/CS option works well, especially for breakfast. But when you are spending time at the resort or out at the pool, the ability to grab a burger, or sandwich, etc. is a great option to have. The cold, pre-made options at the pool just weren't very appealing.
As for having to make changes to the resort to add a CS/QS option, why does everyone think they will have to remove something that is currently there, like the library? We are talking Disney Imagineers, here. They can easily design something that fits in without having to remove anything. There is ample space near (behind) the pool bar, or other areas to at least add something without impacting the look or feel of the current resort, even if it only has limited or no seating.