I doubt CTs newest program for naturals will fail you. Just remember the program is a template. Start with the template for a month and if you feel that the volume is too low then add an exercise or sets and keep going.
The biggest point with that workout and article is that most of us have been doing too much volume and too little frequency. The more energy required during a workout, the greater the chances you use stored glycogen for fuel. If that happens then cortisol is released to get the fuel from storage. Cortisol stops protein synthesis. Longer workout, more glycogen needed, more cortisol, less protein synthesis.
Short workouts done more often result in stimulating protein synthesis more often and keeps cortisol levels down.
Trust the science and give it a shot. I'm 32 and I'm starting next week.