This is my favorite feature from TOME 4. You can talk to other people while playing. You can ask questions. I think having the ability to chat with people can add to the community and get people to stick around more. People can ask for tips. For those who don't want to use it, you can make a very easy way for it to turn off. I would have it on by default since new players will not know its there. Could be a separate window that comes up.

before you judge on this try TOME 4 if you have not see what you think. I don't quite like the way the chat is implemented. its hard to read. Id prefer a separate window.