Use Case Diagrams are hard to deal with when <include> <extend> arrows/connectors work poorly. Make user orient the direction of <include> <extend> connectors i.e. let user decide the shape in which it should connect goals, not only single straight way connection should be allowed, it overlaps the goals and lines hence making dig look messy.
Please fix this asap! People don't buy visio to frustrate themselves when using it. Thanks.