It would be nice to be able to cut the text of what other players say in the chat window. This is useful when playing with people from other countries who speak a different language, as I can then copy and paste it into a translator.
cut and paste, x 2, I needed this just today.
It might also discourage some abusive people and give people a way to cut and paste a whole conversation as evidence.
x 3 - translation issues from today also, I don't do well in French, lol.
chat abuse option would be an added bonus, but I also would love to see a report open built in to the chat somehow, so abuses can be forwarded automatically.