The only feedback that jumps out at me is that while most people will have their own systems, it would be cool to have a simple method to export/import scripts

The only feedback that jumps out at me is that while most people will have their own systems, it would be cool to have a simple method to export/import scripts or share them that is built into the site itself. I imagine a few "standard scripts" like your calculator might be useful to show some of the things you could do and might increase a initial user's stickiness.