It would be nice to have proper syntax highlighting for AppleScript used in code blocks, especially since AppleScript is the primary language posted on this site. Currently the auto-detection usually guesses either SQL or VB.net.
This is already implemented by highlight.js; it just needs to be deployed by Stack Exchange. The tag info page shows there is currently no syntax highlighting for AppleScript. https://stackoverflow.com/tags/applescript/info
As an example, here is code highlighted from this popular answer.