Currently once you start a workout which has been created in the new strength workout builder, you cannot alter some of the key parameters (e.g. adding sets, merging to create supersets, etc). This kind of functionality is so useful (and is built into the free versions of apps like 'Strength Log'). It would be great to have this available as part of the TP version.

Also not sure why you can only create the workout on the desktop app, and then only execute it on the mobile app?