Add more shapes such as semi circle, arc sectors etc.
The shape tool is amazing no doubt but it still lacks some major shapes. If you try to draw a semi circle by a quick stroke it converts it to a straight line, same goes for an arc. This is difficult while taking maths lectures as it requires a lot of shapes. Some shapes that don't work are: semi circle, arc, sector, parabola.
More control on the shapes and their control point would be great too.