Access all variables necessary for each item's appearance
Lots of obvious variables are missing from each type of item. I've not tested exhaustively so I've no doubt there'll be other examples, but here are a few I've recently run up against;
— fillColor and strokeColor are entirely missing from both text and group items.
— where a path has multiple fills or strokes, you can't select which one is referenced, and the rest are inaccessible.
— arrow heads
— effects (eg. I'd like to be able to access properties of a 3D effect)
— graphic styles (reference, rename, create, remove, edit)
Brennan Young commented
fillColor and strokeColor sorely missing. These are extremely important. Also graphic styles.