Dan John’s program is awesome, but I was on a caloric surplus while doing it, so I can’t speak for that program specifically on how it would go in a deficit. However, I have been doing a full body program for the past 3 months, Leroy Colbert’s program from the second article, “Full Body Workouts of Legends.” It’s a lot of volume, about 42 sets total, but I can handle it and push hard with Plazma and maintenance calories on a training day, (3x per week.) If I move through it with purpose and don’t BS around talking to people, I can finish it in about 75 minutes, 90 max.
I started this program originally out of necessity when my schedule became busier and I only had 3x per week to train, but the high volume of this plan appealed to me. I really love the workouts, and because of the high volume, there’s some room for variety throughout the week with varying exercises if you want to. I’ve successfully been able to increase strength, while losing fat and cutting, I’ve lost a total of about 15lbs since I started it 3 months ago. It was my “summer cut” plan and has worked nicely! On a cut, the priority is to maintain (or build) as much LBM as possible. So, a slow and steady approach is best. As my strength has been increasing while my waist has been decreasing, I’m confident I’m not losing any LBM whatsoever. I also feel that confidence because of my nutrition plan that supports my training plan and goals.
Just speaking from my personal experience, I firmly believe, and know, it is possible to train 3x per week utilizing a full body plan and increase strength while losing fat (if that is your goal.) The KEY, and I cannot stress this enough, is having a nutrition plan designed to support your goals, and sticking to it with relentless consistency. If you’re not prepared to do that, you won’t get there.
Regarding your fear of “off days being lazy,” I think if you change your mindset to a more logical approach, you’ll feel better about it. The point of training hard is to RECOVER from training hard, so you can grow and get stronger. So, if you have a great full body training session that gets your CNS going, huge pumps all over your body for 75-90 minutes, you will WANT and NEED those recovery days. With my current plan, when my buddies ask, “will you be here this weekend?” I smile and say, “NOPE, I’ll be recovering,” knowing it’s what I need.