* As mentioned by many other posters, 512 difficulty is way too high to expect reasonable variance for small GPU mining, especially on low difficulty coins.
* No accountability. I am happy with my payouts and have no reason to suspect the operator is anything but honest, but am accustomed to being able to audit a pool more than I can here. Any pool operator can cheat the system regardless of the accountability they provide, and ultimately it boils down to whether the payouts seem accurate (which they do here best I can tell), but more details about which coins were mined, when/where they were exchanged will provide more piece of mind. This information doesn't need to be in real time if the pool operator wants to protect his algorithms (although it's trivial to determine which coin we are mining based on the difficulty).
I love what I've seen so far and hope you consider these suggestions.
It's only trivial to determine the coin we're mining if it's on coinchoose. Which, honestly, most of them have been for the past couple of days. That's not always the case though.
Thanks for your input. Even if it's been said before, it's important to know how many people want certain things.