Tilana opens up the door to a lot more multi-DP openers, and that's really it's main function outside of just being a single-weave space GCD to pump even more AOE damage out. It's something a lot of people who were into higher-end DNC optimizations really wanted to see, and frankly I just love the possibilities the skill opens up. Being able to start a fight with standard on someone, then switching to another DPS and reapply standard asap is extremely nice.