What I really love in the new versions of FME is the 'Attribute Tree'. This occurs if you place a . (dot) into a attribute name. It is a great way to group attributes (from different streams) into sub groups.
For example in this project I have global parameters that are generated in the beginning and used in every feature.

If I create a new attribute before this transfomer, all AttributeKeepers need to be adjusted. It would really help to wildcard these groups, because I know I need all my "global." attributes.
So a small toggle on the main group with 3 modes:
- empty (no childs)
- block (some childs)
- circle? keep all childs, without having to reselect when a new one is added to the group
The last option would be a dynamic selection. For example: keep all " _global.* " attributes

