I love the workout builder, but IMO it still lacks some things for strength workouts:
1. When adding a "repeat", it needs to have the possibility to choose between a fixed set of repeats (like it already is default for the "repeat" now) or to choose a certain amount of time. Like when choosing 20 minutes it will make you repeat the workouts over and over until the 20 minutes are over.
2. There still is a need for custom Workouts. Even if there are many Workouts in the list, not all (or not all variations) are there, which makes it difficult to build a proper routine.
3. Let us switch the language on the fly for the workout list. Sometimes I only know the names in my language, sometimes I know them only in english