Very true. And you know what, now that you bring this up -- maybe he should focus on shorter novels, or maybe even novellas. This accomplishes two things: he gets a bit of a break, and he might be able to write more stuff some years. He has so many ideas in his head that maybe he should consider streamlining his narratives to get more of them out. Lately, I've been thinking that character-driven material, as great as it is, is not as good, on a practical, temporal basis, as plot-driven material that is executed in a purposely concise fashion. The temporal part goes for both the author and the reader, as the reader can get through more works more quickly.
As for the spoiler part, that is good to hear. I think it will be an interesting project (not sure why it's a spoiler, but I will respect its opaque nature).