Well if you want a DPS counter
Combat Stats
This is actually pretty accurate if the circumstances of a fight ending are kept constant. Say if you are killing groups of mobs and getting that bonus experience and have it set to measure DPS by that bonus. If you kill a solo mob it wouldn't measure it accurately. Hopefully someone will make a program like EQWatcher for EQ1.
The big thing here is with UI's like WoW or AC back in the day is that you can add a lot of stuff that automates playing and basically helps you make bots. Buff/port bots in AC anyone? Those features mentioned for the WoW UI, in my opinion, are a high price to pay for what exploits could be done through the system. And their not going to track down the majority of hackers when they have so many subscribers.
Its my understanding that SoE could put these things in the game themselves. I would like to see some sort of new UI feature added every other live update chosen by the players via their in game vote system they used for the Station Exchange poll. I doubt that will happen though.