Darebee workout have a lot of built-in scaling (except when they don't - but classic sets are in the overwhelming minority) but there's little information available to beginners as to how exactly to scale the workouts to achieve their specific goals and what various options available do to their potential gains.
The idea here is that overall difficulty levels that workouts have (in the workout library browser) are somewhat confusing - For example I can do most lvl 3 WO at lvl2-3 and some lvl 4 WO at lvl1. But the gains from doing lvl4 strength/tone workouts on lvl1 will be different than if I do lvl3 strength/tone workout on lvl3.
Let's take a look at one specific workout (just for example)
It's a pretty average workout in terms of customization available. There are 2 options:
a) Increase volume (amount of sets) - that's the first avenue that a beginner will look at, especially since it's so obviously featured right at the top of the workout card. And I know that Darebee team makes great effort not to call lvl1 "easy" or make some options seem less appealing than others, but for beginners lvl1 is definitely easy. (Especially since few people actually read instruction manual before going into workout section)
What that option does is shifting the focus from strength gains towards muscular endurance.
b) Decrease rest times. - Decreasing rest times leads to more strain on cardiovascular endurance and higher strength gains due to faster overload.
Some workouts also have:
c) Various EC that increase workout intensity - double reps, keeping balance, increased reps on a specific exercise, et cetera. Generally, increasing reps would move gains more towards endurance as well as some increase in strength.
Now, the problem is that there's this misconception that working out gives you just one benefit - strength/tone doesn't increase endurance/cardio, etc. Which is not true.
I realize that workouts have their focus - which they are built around, but I think it would be better to rate each workout not only on it's overall difficulty - but also on how it affects three main stats of fitness - strength, endurance and cardiovascular fitness. Or at least mark various customization options with effects that they have on the gains from the workout.
I'll tag Damer to see if I got any of this wrong.
P.S. Maybe it belongs to "feedback/suggestions" section, but come on, no one ever goes there.