Yes, and I think this should be the default behaviour. It's much easier to send anything to the end, if needed, rather than bring back from the end and insert right after one of the 16000+ brushes...
That was one of my biggest pains of working in Dromed.
I think an Outliner with groups, giving you a tree-like view of the world will be a game changer in terms of brush organization, as well as re-timing. You could do things like drag and drop selection of brushes, entire groups, send to the end of the group etc...obviously having better ways to work with sets of brushes (whether as "groups" inkscape/powerpoint style, or "layers", or some other style) is a highly desirable feature for managing brushes.
Layers are planned as well.