Some of this material is, of course, still important but it is a question of deciding what is the most important, most interesting, and most relevant for today's student. As I have said many times before, we should not let the supposed needs of following courses in chemistry dictate the content of the introductory course because most students in this course take few if any further courses in chemistry. Instructors of these following courses in chemistry will have to adjust their material to cover topics omitted from the introductory course. During the past few years there has been much discussion about what could, and should, be omitted from the present course to make room for new material but in the vast majority of institutions and in most text books few substantial changes have been made. My answer is no.
Textbooks play an important role in changing course content.
If they do not change, nothing will change. Occasionally a book comes along that revolutionizes the teaching of a subject, although this has not happened for many years in freshman chemistry. But in any case small changes that often originate in textbooks are better than none at all. I am very interested in any continuing discussion on this topic and I look forward to your and readers' comments.