I think that is some solid advice. I've followed something very similar with the handful of people I've trained with.
It's always the best practice to learn a movement in as low a state of fatigue as possible. Even if you're going to perform the movement fatigued during a workout its best to learn in a fresh state. The last thing you want is to try and work on movement technique and proper muscle activation in a state of fatigue. It opens the door to compensations and if you learn something in a state of fatigue you're body will remember exactly that. Its like that old college myth, if you study drunk you have to write the test drunk, or was that tired? I might have mixed them up, lol.
The best thing to do from the get go is forget about specific reps and sets and the quota. Pick a general range you want to work in, 1-3 reps, 6-8 reps, whatever, and then just play it by ear. I quite literally don't know how many sets I will do until it comes closer to the end of the workout, I have an idea but I couldn't say I will do x sets today. Same sort of thing with reps. I have a general idea of what I'm going to do when it comes to doubles and triples, but I don't actually know if I will do a double or a triple until I'm at that point in the set. It is literally a last second decision to rack the weight or go for a triple. And if I get a triple that's great, if I get a double, thats great too. Same with accessories. I usually do a range of 6-8 and I pick a weight I can handle for that range (plus or minus a rep). I would like to get 8 reps, but if I can only get 5 or 6 then that's perfectly fine by me. This all ties in beautifully with triple progression because I make the rules and not my spreadsheet. :)
Singles are a different animal, I usually know what I will do that specific day, but even those are not written in stone.
These quotas are really only good for reinforcing single progression via load, 5x5 means 5 sets of 5 reps, no more and no less (according to just about anyone promoting them), the only thing you are ALLOWED to change is the load. Which may be alright for a little bit but in the end it will lead to stagnation and 'backing off', or form degradation. Maybe even all 3. Triple REgression instead of PROgression. Oh yeah, injuries too.
The strength trainee says "Why sacrifice intensity when I can sacrifice volume"
The bodybuilder says "Why sacrifice intensity when I can sacrifice form"
"We are not sport, when there is a sport issue, we are not so good. The boxer is much better than us at boxing. But he will have to protect his balls if he wants to punch us."