Free Text Formatting
Sounds like more formatting options, but in specific, allowing free text formatting using just tabs/spaces if nothing else would be a great boon. Less imitating Word than just imitating a typewriter (IMHO the minimum standard of formatting for a writer). Writing even standard fiction, sometimes it's useful to be able to just use tabs or spaces to put text where we as the writer want it to go, and then return to standard (Shunn's) manuscript formatting. I'm sure poets absolutely require this feature, but as a fiction writer I would use it often as well.
An (extreme) example is attached as image: