Pretty much everything that is in SkookumScript came about by prioritized need. Like much video game tech, if it wasn't needed or on fire then it wasn't built.
This means that there are still some planned fringe features that everyone would agree that they would be good to have though still possible to work around. It also means that there isn't much fluff - everything has a purpose and was desperately needed at some point.
We are firm believers that "eating our own dog food" is the best way to make great tech and SkookumScript evolved in the AAA game industry on actual games.
We still have lots of mad stuff planned of course.