Ha! My wife just said the same thing the other night.
I actually agree on adding another color to break up things on the Rhino. I don't think it will cost more, just because it is the same areas being painted. I have to check and see if the current paint masks will work though.
That scheme worked out really well on the 3d render, but when painted, it does give him too much gray. Ditto on the Gaamik (Black/Gray) figure, too.
Going forward, we will send a paint master to the factory for matching. It seems like that makes it easier than using a PMS guide. Plus it will allow us to experiment with different colors prior to getting the factory involved.
As far as your opinions and concerns, by all means let me know. I want to make figures that you guys will love (and want to buy), so we can continue to create new characters for the line. I am really hoping that once things get rolling, we can knock out new characters (not just recolors) pretty regularly. Feedback from you guys, so we can make stuff you want is really the only way to accomplish that.