The Interpersonal Communication Book

I'm beginning to revise The Interpersonal Communication Book for the 12th edition. If anyone has any comments or suggestions, please let me know. Are there topics not included that you feel should be? Are there topics that are included that you can just as easily do without? Are there features of the text that you particularly like? Are there features that you don't like? What worked well in your class? What didn't work well? In short, I'd appreciate any thoughts you'd care to share--from design to my coverage of theoretical issues or skills.