I have to say that John Cox is tackling some topics in his opening books that most authors would probably rather avoid.
Alekhine (awkward, messy, too unexplored in places, "Burgess did it")
d4 Deviations (too many transpositions, boring, trifling, "Burgess did it (Torre Jungle

)")
And I am happy that he chose to write about these topics (especially d4 deviations)! His work is very readable, and I like his balance in detail in his choice of variations.
And now a repertoire book for 1.d4 (Starting out!?) recommending all these main lines...
I think you could write a book just cataloguing the main lines for discussion. This certainly has my interest. I can see the cut-and-paste option for the summary thoughout the book: "Refer to the lastest New In Chess yearbooks and Informants."
Seriously, I do like the concept of summarizing the main lines. This is something I feel is lacking in chess literature. I think there are too many books that keep recommending auxiliary repertoire options to "surprise" the opponent. Even though this will be a summary, it still seems rather ambitious. Well, I look forward to seeing this book.