I don't see what kind of service exists currently at McDonald's, or any fast food restaurant.
Within two miles south or east of me are two McDonald's, each run by different franchisees. The one east of me is terrible, usually messy looking, slow to complete orders (and you better double-check that they got it right) and one where - on more than one occasion - I have witnessed intense arguments between employees held right in front of customers.
The other one is almost always clean, quick and courteous. The employees go out of the way to be helpful. While I hesitate to call eating at McDonald's enjoyable at least at that McDonald's I feel they do care about making my visit pleasant.
There are levels of service in fast food restaurants, even within the same chain. And while I would not mind seeing kiosks replace employees in at least one location I do feel that the other would lose something without its employees.