All good points. I was going for the down and dirty basics. At 23% Bodyfat, with regular heavy lifting (e.g., no real risk of dropping muscle mass), the scale is "good enough," IMHO. Personally, I use the scale, the mirror (terrible indicator frankly), and my gut measurement.
And if he's looking at cutting drugs, I figure all that calorie counting, macronutrient ratio stuff is too "complex" for him. Just a couple of diff't approaches.
Re: the recomp bit . . . you mentioned your first cut . . .I wonder if this was during your "noob gain" stage? Otherwise, it's like the holy grail: losing fat AND adding slabs of meat at the same time. LoL