Looking more closely at the look and feel, I thought we should ensure that
a) the width of the menu-strip group should be same as that of the drawer when open.
b) there should be some visual cue for a user to find out which group has a drawer and which one doesnt
Thats exactly what we have now :-).. Up/Down arrow is shown for groups that have a drawer. Besides, a tooltip is also shown. The tooltip basically summarizes whats contained in the drawer.