One of the most useful features of VE right now is the ability to edit templates and references and tables using a visual form; templates and references use a modal panel and tables are tables.
Maybe it would be nice to be provided an option in the wikitext editor which allows me to edit those as if they were being edited from VE. (A table you could pop up in a modal panel also, if you don't want to hack at displaying the table directly in the WT editor.)
This is along the lines of my comment earlier regarding merging wikitext and visual editor, but is a much more limited scope.