A simple but super useful feature for me and I suspect for many others is some "status" indication for the script, being that its been "created", "building", "drafted", "reviewed", and "completed". Completed scripts could even be archived. If your working with multiple scripts in batch editing and sometimes create a few batches out it can take a moment to orient around the state of different scripts and where you left off. This feature helps get back into it quicker and also if your working with a team, let's say a writer or editor they can see which ones they need to help proof read.
A lot of the states can be automatically derived based on what stage/step the user and completed the script up to. Complete likely being a manual button that needs to be clicked.