I think that Ray Franz's intention to include the material does not equal permission from the copyright owner in law. I suspect Ray Franz would have made sure this was in order if he had got round to it himself. Has the current publisher done so?
The reasons for cynicism are these.
1. There is no good reason why the book could not have continued to be published when Cynthia died in 2013, in the original format, just as it had continued to be published in 2010 when Ray Franz died.
2. We were promised at the time that the book would be available within weeks. Instead it has taken nearly half a decade. Why?
3. It is still not actually available in print yet. It's promised for a few weeks' time, but we've been here before. I hope it does get released, but on track record we shouldn't count our chickens yet.
4. $9.99 in certainly not expensive, but it's not as cheap as it might be either, for an ebook if your main intention is the widest circulation possible. Unfortunately between the delays, changes, and ebook charges, it seems fair to conclude that wide distribution, as quickly as possible, does not appear to have been the priority of the copyright owner.
5. It's terrible that anyone suffers illness or through the illness of others. But to deflect any valid criticism for poor decisions over many years on that basis is what is cynical.