As a balance druid main as well, it feels great to be able to DPS without being a slave to an auto-scrolling bar. With the new astral power, you can choose how and when you want to spend your resource based on the situation. The new starfall is interesting because it feels like there's a little more skill involved as opposed to the current passive buff.
The only thing I'm worried about is the fact that our new resource is essentially runic power/rage/even maelstrom. I'm afraid it will feel much like playing a DK, warrior, now shaman, or any other class with a generic build/spend resource. My