This is exactly correct, as long as you are doign soemthing for all of the body.
I do unweighted, Davies type GPP with most of my soccer players to break up energy system training. We progressively add time, but do it by alternating between 20, 30, and 45 second intervals of change times... mix it up a bit.
What we do is to go for 3-4 minutes, then juggle a ball for 1-minute, or do churn and burns, etc.... during the minute recovery, I just ask 4 players to pick out the next 4 GPP exercises. We pick from a list of about 100 BW calisthenics my kids are familiar with... I mark the ones they pick off, so they don't do the same ones again and again...
Categorize the exercises you like to do and just pick one from each category, or whatever... keeps it random, but encompassing.
Hope this helps.