Love DC training. Trained volume for years on end and looked the same. Now i don't think i'll train any other way (except maybe Dr. Scott's Fortitude Training cycled in and out)
For the guys with injuries or joint pain, highly suggest just increasing the rep ranges. Doesn't matter if it's 8 reps or 20, progression is key. I usually do RP set of 20 if i feel vulnerable on a movement. My joints actually feel better with low volume compared to 30 set leg workouts..Or maybe it's just because i'm 26 years old!