I agree, it's kind of a one-time affair too because if you ever need to add or change a word in a node, you're fcked and have to edit ascii to change borders and lines and what not. There are way better ways to spend your time than to draw an ascii diagram.
I've only been using it for a few seconds, so I don't know if I'm off-base here, but isn't that what the third-to-last icon at the top does (box with diagonal arrow)?
Well, the only worst think would be to have to launch Visio, Powerpoint or whatever and then export and then re-embed.
Especially if you want to fix something done by someone else so you only have the image and not the binary... Also, versioning.
