But what's with the griping about textbook publishers? The overreliance on adjuncts allows the university to charge lower tuition and the publishers make the feat possible!
The goals of the students will also need to be taken into account. A colleague gave up giving detailed comments on the lab protocols he graded, the only thing the students were interested in was the grade. My experience matches. It's understandable, at our institution students mostly plump for medical school or associated profession, and it's the grade that counts, not the subject knowledge. The GPA really haunts you.
Not all publishers. Just those that make trivial, minor changes that prevent you from using used books for classes.
Also, the whole "Let's create a separate text book for each university" thing.