I was happy with the shoutbox tbh. I don't need features. What I want out of a chat system is to be able to see what other people are saying easily and respond to them.The new chat system is far more robust and is available anywhere rather than the forum home. I'd really suggest getting used to it as you'll like it much better than a simple shoutbox.
I just know I won't use it as it is. It blends in at the bottom of my screen and is reminiscent of a cookie notification which I usually ignore.
I can understand if others feel differently though.