I feel I have to say I like the URL shortening and don't see the point of displaying it all. (that is a -1 on turning off URL shorting...)
If you want the url, just right click it and copy it to clipboard.
Or point at it and let your browser display it if you just want to read it...
Long urls in messages breaks the flow, and looks terrible, and I would hate having to check if I need to shorten my url before posting...
How often do you really need to see the full url compared to all the cases where you just don't care?