Made this today - fun stuff, but surely a builtin RTF text UI element would be nice to have. Though for this thing, the most work was actually the Lua syntax highlighter more than the displaying of information itself.
For most of the part, I miss the ability to make any font bold, italics, and the possibility of text shadows / text outlines. You can do a bunch of stuff already with TextLabels, just not as easy as i.e. with HTML.