Emacs can be pretty graphical depending on the mode (see Latex preview for AUCTex mode for example) but you're also right: I don't think Markdown mode supports

Emacs can be pretty graphical depending on the mode (see Latex preview for AUCTex mode for example) but you're also right: I don't think Markdown mode supports the more advanced features you just mentioned. (I wouldn't use Markdown for the advanced features I like it for its simplicity.)