I agree. I, too, have used this book with varying degrees of intensity for the better part of 15 years in the manner described above. By now I've found the patterns I dig, and I've chosen a few based on the fact that they didn't feel natural to me - either to my ear or under my fingers. This is one of the few times when I advocate for "learning in all 12 keys." Occasionally I use the book as part of my warm-up routine.I will say, however, that I got a lot out of picking a few specific phrases from that book and taking them through all the keys. I think that's the kind of book that you'll get more of by spending more time on a few specific things than trying to hack through the whole thing as fast as you can.
That said, some of the players I went to school with worked the book cover-to-cover and (seemingly) mastered all the patterns in all 12 keys. But, keep in mind, these are just patterns. They're not ideas, and the idea is to expand your facility and your ears so that you can create and convey musical ideas.