Thank you very much Mean Mr Mustard!
Initial comments: first of all I think it's interesting that there are not many changes. I can't quantify it, but I think there were more changes around the first few printings of the NWT in the 1950s and 60s, including some striking ones. (John 1:1 "Originally the Word was with God...") Maybe this indicates a degree of care and decisiveness with the 2013 revision.
Second comment: what on earth went on in Matt 5:18? It's almost as if someone with a sense of humour in 2013 decided mischievously to remove a phrase from the very verse of the Bible that says no jot or tittle can be removed.
Bibles sometimes get nicknames because of such mistakes, most famously the "wicked Bible", or "adulterous Bible", which instructed rather than proscribed adultery: "thou shalt commit adultery".
Maybe the 2013 NWT could be named the "heaven passing" Bible, because of the missing "smallest letter". Or a catchier title I can't come up with.