Drendran, since you can make addons, here's an idea which I've been sitting on for at least a year that would help this a lot.
The idea revolves around filtering important chat out of the mess that you usually get in filled servers, and putting it into a GUI or second column of text. Chat messages like teamchat and team leader chat will automatically filter out to respective columns so people can immediately read what is important without having to happen to glance to the chat at the right time.