Animation is a major step, and although many parts have already been worked out (e.g., http://www.ceder.net/animation/movdan4.php). Implementing animation would involve a lot of work, and would be feasible for perhaps only the standard versions of the calls. It would be very difficult to instruct the program how to animate calls when concepts are applied.

Timing would be easier to do, but again, would only be feasible to add it to the calls.