I like and use the Emacs keymap a lot. What I miss is a 'redo' shortcut: somehow the Emacs keymap suppresses the existing 'redo' shortcut (i.e., Ctrl-Shift-Z or Cmd-Shift-Z) by the default keymap and does not provide an alternative. Under emacs one would press Ctrl-g and then press Ctrl-Shift-Minus to redo changes. This does not work with the Emacs keymap.