My favourite new features are the shapebuilder and Eraser tools, they are a great step forward. What I would like to see in future is the ability to create custom nibs for the shapebuilder.

But what I would really like to see is a brush tool that stretches your brush along a path.

Better brushes would make it easier to create custom frames for photos and text boxes, create swirls, and design elements and I could see it be useful for websites, and perhaps it would open the door for a new type of templates that would include brushes!