I think it all depends on the horse, and his trust. My horse used to be with his head just past my shoulder. I hated it. We worked on it for a while. If he stepped too far in front, id make him circle around me. When he was doing much better and just needed a reminder, id swing the lead in a circle in front of his chest so he knew his boundary. Now that we have a much closer bond, he walks a few steps behind me. I think its more of a comfort thing for him. Before his mind was "Where are we going? What are we doing? Whats going on?" now he's more in the state of mind of "ok, moms comin' to get meh." as he moseys along. But I keep his awareness and ground manners sharp. If I stop, he stops, if I turn toward his hind end, he moves it away. If I run, he trots. It doesnt sound as if he's dragging you along, I would leave it.