I'm glad to hear that you liked Drench. I haven't tried that one yet. I did Core earlier today and was disappointed. My frustration in this program is that it is advertised as being "hardcore" and "intense". So far, the workouts that I have done haven't been either one of those things.
No disrespect, but are you sure you're doing them right? Just about all yoga & Pilates have enormous ranges & can be quite challenging, even the simplest moves.
I for one, really like what she's doing with these, and I have to say would give me a reason to look at all the latest offerings from BB including T25, P90X3, and this one Piyo.