Instead of adding more items to the UI why not program it around the class on what does/doesn't display.

For instance, as a Ninja I couldn't care less about how much MP you have, it's completely out of my hands, there's nothing I can do about it. So why not just program the class so that someones TP bar shows up instead of their MP bar. Same with other classes that can help manage TP/MP. Or is that too much of a pipe dream?