Reminds me of the old, but good, one day per muscle group. Which included 15 sets on each group. Works for the old timers quite well. If I remember right it had a 6 day a week plan. With seperate days for triceps and biceps, not on the same day. With the legs, I would replace the Dl with BB Hack squats. And have DL's with the back day. Just my view, that's all.
Throwing in a leg curl exercise(one leg at a time preferred), might be better than a SDLDL for the hams. Leg curls follow the direct action/function of the hams. Like with the biceps, you do not just hold a weight for the stretch, but actually curl the weight up. DL's, on back day, affects the hams also, but to a lesser degree. Just to add: Romanian DL's will hit the hams better than SLDL's, in most cases. Unless you keep a stiff back throughout the exercise. Good Luck.