We have a Peloton and I use TR and Zwift on road bikes with an occasional Peloton ride. Based on the reviews of the Kickr Bike, it can be easily adjusted. Generally, the in and out of the saddle HITT rides on Peloton are harder on knees than TR or Zwift. I don’t think you appreciate how awesome your FTP gain is and I wouldn’t mess with that success. Structured training is not for everyone and if you like it, I would go for the Kickr Bike in the long run. It’s a slick set up as well. The Peloton does give you a variety of hand positions but I would trade that for ERG mode on smart bikes/trainers and ability to change gears on Zwift.
One issue that has come up with the first gen smart bikes is thigh run in the bar. I think this comes down to anatomy and pedalling style. It’s not an issue on the Peloton or new Stages smart bike.