GC has seen substantial improvements over the last months, but the work editor was left behind. One of the main reasons to use a sophisticated device such as 920xt is the ability to perform complex workouts. The current workout editor is a bit limited, and specially cumbersome if you have a lot of workouts.
A simple modification to GC workout editor would be to allow folders to be created, browsed and renamed, and move individual workouts into/from/between folders. Every user is comfortable with the similar abstraction of using files in Macs and Windows.
The user would be able to create folders such as "Cycling" and "Running", or "Base", "Peak" and "Tapering", or still "Ironman full distance" and "70.3". One last useful thing would be to allow searching on those folders, such as filtering workouts longer than 120 minutes or some distance.
This would allow tidying up the list of workouts, currently a mess if you have a few dozen.
