Open last project at startup:
Same as Visual Studio and other IDEs.
While the editor has a snap to grid option it would be very useful to see the actual grid.
The ability of executing external applications.
Clipped Tiled Background:
Same as Tiled Background but instead of seeing the entire background in the screen you only see the scroll in a given clip/rect.
Primitive/Canvas Drawing plugin
Same as the canvas plugin but official or at least a plugin to draw primitives over the game canvas.
Awesome work guys!
Sorry for my english
EDIT: BTW what is Object Grouping? I saw it listed on the store website but i havent founded the feature in the IDE.