Sometimes you have a show start late or run long (or turn out to me 90min). It would be nice to have an edit function while it is recording, if only to add padding on the end.
I assume you already know this, but for anyone else reading this, a workaround would be to schedule the following show to be recorded, too. It would be split in two files, but if it's a game you want to see the end of, then it might be worth it ;-)