I am definitely not a fan either, because my last 2 trips have been with DD at 2 and 3 years old. She is extremely active. Either DH or I park her at a table and get her settled down while the other one grabs food for all of us. Standing in line with her would have been a disaster. There is no way to hold the food, coral her, and keep her still enough not to knock into other customers and have their trays of food come crashing to the ground. She will stand in line fine when she knows there is a ride at the other end, but food is a completely different story.
We have also had my Mom (in her 70s) on one of the trips and my MIL who has physical disabilities on the other trip. By the time we stop to eat, they both physically NEED to sit down and have one of the rest of us get their food for them. Don't even get me started on the fact they replaced all of the chairs with stools at Pecos Bill. I haven't seen them yet, but I don't think we will be able to eat there anymore. Neither Mom or MIL would be able to eat there- they need seat backs to lean on. I don't want to sit on stools without backs either, as I like to lean back and relax while I eat at WDW. Plus, I don't think DD will sit still on a stool and I also worry she will fall off and hurt herself. On our trip last December, we saw a kid fall off a stool at one of the restaurants (not Pecos Bill), and get hurt.
I'm not real sure how they would do it at Cosmic Rays. I think they have a problem there because they have different menus in different areas. In fact, that's one of the things I hate about Cosmic Rays. Our family never wants things from the same line. When we go there, I have to park DH with DD, then I have to go through a line to get their food first. Then I have to go back and get in a different line to get my food. It's such a pain.