Hey, I've got this book and never noticed that recipe toward the back! Reading it now, it strikes me as something heading in the same direction as the New Belgium 1554 clone that I've been tinkering with, but likely to have a silky body to back up those roasted grains. You've inspired me to try this too - Thanks!
Regarding low OG with adjunct brews, I've been experimenting with cereal mashing using Randy's American Adjunct Mash Procedure in chapter 11, and it's helped to get me back in the 75ish percent efficiency range for the raw grain I'm playing with. I'd likely try that procedure first if that's not what you did. Also, I don't "crush" the raw grain anymore, I pulse it in the Vitamix to bust it up into something closer to flour to ensure accessibility. I don't know if it really helps or not, but I was only getting roughly 50% with my adjunct with a standard step infusion mash and without grinding it more finely.
But as you say, it still makes beer, and actually it's nice to have some beer around that I don't feel guilty about cracking open a little earlier in the day...