I like
#500 (and #501 almost as much). Much improved!
But I would still like to see if the green part of the symbol can be made a little more translucent. It seems like the blue is glassy, while the green is a touch "cloudy." I do like that it is starting to look more cohesive with the blue part, and that it has an inner glow.
We're so close, and I'm sure this is the last thing before we're done. Thanks.