For example, some of the brushes when drawing appear as a purple pathway first before turning into a line from the brush you have chosen. This can ve very frustration if you are using for example the water colour brushes. You should also have a circle radius around the pointer before drawing that enables us to see the size of the brush as you can on some features in photoshop. This would be very helpful to artists to see the size of the brush they are using and the brush lines you have chosen to appear instantly as if it were really watercolour on paper etc.