Bill Spight wrote:It is worth noting that in the customer reviews, a couple of DDKs rated the book highly. I expect that they found the simplifications beneficial.

I think that these "simplifications" are a very good idea, especially from the pedagogical point of view.
They create some kind of sub-problem(s), and this could be done with other tsume-go as well. Remenber that there are many tsume-go that contain a variation of an already known position / shape.
There are several problems, especially "classical" ones, with different problem set-ups known.
The "easier" version of these already contains e.g. moves 1, and 2, of the solution of the "more difficult" one.
On the other hand, there are a lot of problems, where e.g. moves 1, and 2, of the solution serve as a kind of "appetizer" only, just because these are so "easy" to find. But the real problem of the problem comes later.
A generalization of this concept could result in sub-problems of the following kinds:
-- Move 1 has been placed mistakenly. Find the refutation for the defender.
-- Move 2 was a somewhat unusual reply. Find the refutation for the attacker.
Probably the reader would learn more this way, instead of following explanations about (mistaken) sub-variations only.