Gerry, you can prune the heck out of tomatoes and they don't care. I keep the bottoms trimmed up then when the vines start to overwhelm the cages I prune off any unproductive vines.
Regarding sprawl culture -- it works well until you try to harvest and have to wade through the plant. I don't care for it. I have some cage made out of sheets of the
concrete support stuff and it's no effort, really.