Man, I can't seem to ever get done with enhancements to WordPress categories. I hope there's more work done on core category options in the future. Especially with the emergence of site theming and siloing of late. I know WP is ahead of most publishing systems in terms of its early support for categories, but it seems they've left lots on the table after that.
Does a hook exist that would allow one to enhance the widget options for the category widget in order to allow setting the default sort order?
Also, I notice in the codex the options for sort appear to be one of any of these (id, name, slug, count, group) and either ascending or descending. So, Ideally a drop down menu on widget options panel to allow one to set those two parameters (order and orderby) is what I'm looking to do.
Otherwise, I'll just filter wp_list_categories and add the order option to my theme options, but it seems more logical to put it on the widget control itself.