With all the spam happening around main chat, it's really hard to notice messages coming from your teammates. Would be nice to see /pm and /w somehow stick out. Doesn't really matter how, as long as you're able to catch the msg without having to read everything.
Few examples on how to do that: highlighting the text, changing text to a different colour which doesn't show up often in chat or making the whole line(both the receiver and the message) same colour.