Yes please, I would love to see tons of options for chat, even able to make your own channels with passwords would be cool.
Private messaging should be easier, I would like to see a tab for each person you talked to in a private message and just have an x to close it. Darkfall does this and it helps a LOT.
Yes please go look at wow, eq2, eq, swg(before it gone), and many more.When it comes to chat you can never give us to many option, This is how your players become social.