I thought the same thing about the stranger team.If I recall correctly, you do still get to room with your partner, so at least all of them will have each other in that respect. And it could make for interesting alliances later on.
Agree with you about the "easy" part. I've had 20 minutes of Jillian at home by video, and it was 20 minutes of knowing that she's no joke. I know she's not there, but same styles.
I don't know how any of them really survive that first workout.
I have had two personal trainers. The first one started me off fairly aggressive. I hadn't been as active prior to hiring him. After our first workout, I was a little nervous because we did a lot of jumping rope, etc., and my shins hurt. We ended up meeting for about 24 sessions, and I would say the last 23 focussed more on weights. I did get pretty toned with him in that regard.
My second trainer came along after I had been working out more, and our first session pretty much blew my fitness mind. He had a style very similar to Jillian in his methods, but he was very nice. Super nice. I recall feeling close to puking twice with him. I left it all on the floor. He worked out with me, and I really pushed to keep up with him. I wish I had been able to keep him.
There was another trainer at our gym who did a Saturday morning "free" class, and I loved it. It was a combination of weights and cardio. I ended up breaking my wrist in one of his workouts because of a fall. He left our gym and is doing his own thing now. When my contract expires I'm going to explore him as an option.

Samboobree, brought to life by Arkie