The dependency mapping could be more robust like MS Project where we could drag one parent dependency items end date to impact the child dependent start date to move. It's a feature implemented in MS Project for a very long time and is truly useful when you are tracking someones work to start yours , Start to finish , finish to Finish , start to start and finish to start could be really useful dependency tracker for Aha!
Thank you for your idea. Dependencies in Aha! are currently "finish to start." Dependent bars can be moved simultaneously on the Gantt by multi-selecting and dragging together.