1. Condition - 'Window is Resizing' - for when the application scales to the browser.
2. Layers - A drop down list to select layers in conditions/actions which require them (e.g. Create Object, Layer Is Visible). Unless creation and destruction of layers during runtime is planned. Which would be awesome by the way.
3. Arrays - The ability to specify the number of dimensions an array has.
4. Collapsing of events in the event sheet, as in CC. Was very useful for organisation, I found.
5. Arrays - For Each Element where axes are specified as XY, the ability to specify Z index.