Since toolbars are mostly for mouse users anyway, perhaps some of the toolbars could have an autohide option? Mousing over the toolbar area would redisplay the toolbar for a short period.
This option would simplify the appearance of the XE interface without removing the convenience of the buttons for mouse users.
For instance, here is my current setup:

Not too bad, but it could be simplified further (with mouse-over redisplaying the toolbar):

This is not a "big deal", but it certainly would be nice!
...and as always, thanks for listening and thanks for such an excellent file manager!