One place I think this could be really useful is for people who are doing something outside of their usual wheelhouse, either for fitness or just a bit of variety. For example, I’m pretty focused on tri year round, but during the winter I often throw in a v02 or sprint block for a laugh and a bit of a different challenge. Something like the structure you mentioned would be ideal for that- it doesn’t need full plan builder functionality nor the kind of event specificity a build program might provide. Those athletes also might not have the same level of knowledge when it comes to abilities that are typically emphasized less in their training, or require a custom progression to achieve what they’re after- you’re basically just looking to hit it for 4 weeks and get back to whatever it is you were doing.
Given some of TR’s advice on shaking things up occasionally and the emphasis on becoming a well rounded athlete, I think this could fit pretty well into their philosophy.