It would be really nice if the multisport feature tied together all the events and transitions. The map could show each of the four actions, Swim, Bike, Run, and Transition as a unique color. Then be able to play and watch yourself go through the entire event without having to switch activities.
It would also be nice to be able to stitch together past events or simply stitch together two activities that you meant to be one anyway. I know someone has created some code to do this but it should really just be a feature set of Garmin Connect.