Adding commenting functionalities like regular programming languages have would be great. The ability to label certain triggers or widgets with notes you might have is great.
Also the ability to comment out certain parts of a trigger would be very helpful when debugging.
Another thing I think would be great is adding a spot somewhere in the tulip editor for common triggers and widgets that you made, just like subroutines. So instead of copying and pasting, you can just invoke the ones you need.