I have a theoretical problem, with the usability of the categorization choice. For an User it would be nice, when he can see the entries of a sub-categorie when he choice the main-categorie, as a tree or something else.
My question is, what musst be edit in alfresco, to change the choice of the categorization?
Give it an workaround to fix that, for more usability?
Have a look at the new AJAX category picker in v2.9B (you may want to install this separately to your production server). That may be closer to what you need (although it's not a tree…)