Revamping the system is a large ask, and while it's on the to-do, it is not on the very top of the list.
That said, we do recognise that the community very much wants this functionality, so it's not at the bottom either 😉
You'd like the category to remain visible even if read access is not granted to the viewing user?
This is how the permissions system used to work (categories would not hide even if the viewing user did not have
read access), but was changed recently since people did not want private categories to be viewable.
Perhaps an "Always show category on forum index" checkbox may help? Let me know if this is what you had in mind. (Functionally, it might end up being a permission, as you've suggested... "see", perhaps)
Currently configurable per category:
Currently configurable system-wide:
Now I want tho add the post-privilege for guests into category-dependent and add read-privilege as following:
Configuration per category:
My problem with current configuration is a) no category-dependent settings for guests and b) I can't have a category with write-permission for admin only but visible for guests also (like I would like to have my announcements).