It's good that they revised that ridiculous restriction, but I think they should go further still. It was disingenuous to advertise the iPad as a "computer replacement" when having an environment for Python coding (widely used for beginner programming) was essentially banned. There really should be a way to work in even compiled languages on iDevices.

I thought that apps that used their own interpreters weren’t allowed to download additional code after installation.

Having a self modifying app is a nightmare from a security & privacy standpoint.