These are some potential ideas and direction we could take the brush editor settings area going forward.
Currently the editor is locked to the toolbar, but there are more long term plans to make it detachable.
I think when this happens, it is going to be more important to condense this window. There is some feedback that the live preview area needs to be larger. It doesn't give a good preview with painting brushes that are usually over 80 pixels. Right now the brush preview area only shows up to 20 pixels big.
I also think we need to organize the configuration options more. right now the brush editor configuration options are all over the editor. They are settings that aren't tied to a specific brush, but span across all brush presets.