I think a lot of the confusion comes around this:
I made a video to answer a simple question asked by viewers: how would I evaluate the training program as a whole. So I did that. It's positives, what it does well, what it lacks, what to watch out for. And overall I said: It's a great way to build aerobically. It's drawbacks are it's one dimensional and neglects speed.
What you all are asking in this thread is a different question, which is: I've been doing this training for X months, should I adjust.
And I've been criticized for not giving substance, which I don't know what that means exactly. But part of that is because the answer to the above question is always contextual, and always...don't change much and do so gradually.
Like, if you came to me doing 200m repeats every single day and you were PRing, I wouldn't immediately drastically alter that. I'd say okay. Let's evaluate what is missing from your program. Let's evaluate where you are at relative to your goals. Let's weigh the costs and benefits. And then make gradual changes.
The first step is always looking at what is there and what's missing.
I've seen it all. I've got world class 5k runners who didn't have a single threshold or tempo run in their training. Some without any strength/power/pure speed. Some with no long runs. Others with no long repeats. And on and on. It doesn't mean you instantly say "Ah, no tempo runs, let's load them up." You say...okay how is this impacting you, is it worth it.
How do you evaluate that? You look at their goals and their physiology. With elites, I often do a lactate test that includes a threshold step test + a max 400. Or sometimes you do a speed reserve test. Or sometimes you simply compare race results. How does their 800-1500-5k, or their 5k-10k-half marathon line up? Or where do they line up in terms of workout strengths (do they kill tempos but struggle on 200s, or long runs.)
That gives you an idea on where the weak link in the chain is. Is your 5k at 4:50 pace, but your 10k is at 5:00 pace...well we can't get the 10k any closer. So we have to investigate why your 5k is stuck at 4:50. Sometimes that answer is way down the chain, sometimes its closer by.
Then you look....hmm is this reflected in training? Do you have that weak link because you never do anything faster than 5k pace? Or whatever the reason may be.
Now, with amateurs, you've got more weak links everywhere. So the truth is you just do something pretty good for a long while and you've got room to grow. But again, you make that evaluation on an individual basis.
Once you've got all that sorted, then you start looking at what's the easiest, risk free way to introduce a solution. And then you get to workout progressions, blends, combos, etc.
So again, maybe this all comes down to, oh Steve isn't giving us exacting answers. That's because there are none. There is no formula for training or coaching.
For the guy who said he's happy, injury free, and running well. Well, don't change much. To the guy who says his shorter distance is blocked, a weak link, well...gradually change something. And no, don't just run more 5ks.... Be systematic about it. I don't think a 5k race is less risky stimulus than a well-crafted progression of 200s, 300s, or 400s, in a controlled fashion. Or adding in some short work in a combo workout. Again, the exact workouts...depends on what the weak link is (is it rhythm/mechanical, physiology (able to tap into speed/FT fibers), etc.).
I'm going to sound like a broken record, but I think a lot of the issues in this group (and amateurs) in general is you suck at running workouts. Everything becomes an X factor workout. A test. A proving ground. So you associate speed work with risk.
Instead of seeing that Bob Schul built world class endurance and a very high threshold doing the vast majority of his workouts at distances of less than 300 meters. Again, not suggesting you try that. But just suggesting you expand your definition of intervals to see more controlled, aerobic, etc. style.
And to the guy who asked about coaching. I'd love to, but life is way too hectic to commit to any other coaching folks. I coach a handful of elites because of the challenge of it.
Anyways, I'm really no trying to pump content for contents sake on youtube or elsewhere. I made a video because I had a bunch of people ask. So I gave my honest thoughts based on physiology, history, and my experience. I've done the same for many programs. Every program has it's flaws, including my own training preferences.