I loved what I did after STS -- I went back to total body workouts and put kettlebells back in the mix. I did something like this:
Day 1: a Cathe like MM, ME or the 4DS total body premix
Day 2: cardio coach
Day 3: Jillian NMTZ, Lalo, or Squeeze Stronger -- something with lighter weights
Day 4: some cardio
Day 5: a total body barre workout (very light weights)
Day 6: kettlebells
Day 7: stretch/yoga
I loved the variety! Unfortunately, I think I do need to stick with a split, so even though I enjoyed this, I am going to start a second round of STS (I'm finishing Cathe's August rotation which was fun). I'm looking forward to doing a second round of STS, but there is something about all that variety that I really enjoyed.