Ron didn't mind flying in the back. He was able to keep an eye out on most of the group, making sure no one wandered out on their own. And, as most people were eager to be doing something, it left him with some quiet for a bit.
He didn't want to just discover dead bodies. He wanted to find the Death Eaters and kill them all. The chances were unlikely of that, and given the choice between not finding anything or another gruesome discovery like last time, he would choose the former. But there was a part of him hoping to just take them down.
Except on this trip he knew that if they did run into Death Eaters, his status would change on the map and that Hermione would probably join them, and he wasn't too keen on that idea. He'd meant it though, when he said that was only because she was still recovering. She'd been right when she said that if he wanted someone who would stay home worrying normally he'd chosen the wrong woman. He hadn't. He'd told Harry on multiple occasions that they'd be in a mess without her. And that was true.
Right now though, he wanted her safe at home. And he wanted to make sure that no one flying with them got bored with the task, despite the bitter cold and the potential of it all seeming like a giant waste of time. So he kept an eye on the group ahead of him while making sure no one had missed anything on the ground.