MMO Champion has a brief mention which has me quite intrigued. It reads, "Last but not least, the Minimap now allow you to track multiple things at once! Hurray!"
As someone with mining as a lame-ass skill (Yeah, OMG, he has mining as a skill?!?) This change is a godsend if I can use it and track DPS targets at the same time. Generally these days, I don't use mining for anything. I'm waiting to see how buff other trade skills will be in the expansion.