The ability to edit the structured workout via the app. Using the web based site is not responsive to the screen size of a phone. Having to use the computer is pretty annoying when planning your workouts.

Example. A power based structured workout will require the lap button option to be enabled on the rest of an interval. Especially important when running or cycling in hilly conditions.

Often times I’m running all kinds of virtual training apps on my iPad and it is not convenient to use PC/Mac to do the work every time. I’m thinking it is much better if I can build/adjust certain workout by phone on my way home or in metro. It will save a lot of time

I would suggest if possible the feature to build workout on iphone/android mobile app to be available in future. Will help for individual with busy lifestyle/not having access all the time to Pc.
Regard

I would like to be about to build and edit structured workout on my android app. Garmin Connect created a very user friendly way of doing this. Please consider this as an option.