For shapes i think after you draw a shape you can tap on it without the stylus and be able to change the corners for example on a parallellogram and make it to a trapizoid or stuff like that, to be able to change only one thing about a shape.
For images sometimes if i take a pic of a board i would like to cut it to specific parts and i don't want the whole image, there isn't an option for that and i think it would be good to implement it.