His formula doesn't really go against some of the best. You sound like you might not be very smart on training if you think that.
Does JS have a different approach? Yes. Does it come across that JS prescribes a very consistent and similar training program week over week? Yes. However, let's think about what he is doing....
1. Lower end of weekly mileage. Nothing high. This is different than most marathon programs, but not out of the norm for successful programs/coaches.
2. 1 threshold/cruise interval workout each week. This is key to any good program. Running at lactate threshold is a huge component of getting better. Very similar to other good programs.
3. 1 VO2 Max workout each week. Other programs usually have this, but in a a specific phase of a season. However, JS has this season long. From my understanding, the idea is to focus on this pace season long, allowing runners to progress fitness running at VO2max much longer than other programs. He can do this by not having runners completing more taxing VO2 Max sessions (3xmile @ 5k, 6x800 @ 5K, etc). It's an interesting take.
4. Long Run with threshold pace on/off at the end. Very similar to successful programs.
At the end of the day, he has components in his program that are similar to good programs. His low mileage approach with a constant season-long VO2 Max session is unique. However, many ways to crack an egg.