I would require the following:
- Tags for topics (and be able to set the markup in a special color or with [] braces, also allow to choose from certain tags in certain forums)
- Search options when choosing a "group" from the dropdown it should also show people who have that group as secondary group (or have an option to choose this)
- ACP where the group permissions are you should be able to see how many people the settings have effect on (in other words once again include people that have that group as secondary group set)
