Remember the OpenACS 4 docs are a mirror of the documentation that comes with OpenACS. We might restructure it, but with the amount of information, there will have to be some way to structure it.
I think general comments are really not that useful. You have to scroll all the way to the end, and unfortunately the people who maintain the docs rarely read them.
For omissions or corrections the better place to comment is in the bugtracker https://openacs.org/bugtracker/openacs/
You can comment on the OpenACS Core Documentation package or on a specific package's documentation.
Maybe a link to bugtracker with some information pre-filled would be more useful than general comments.
