The 2D work actually accentuates the image well, and it would be good to see more of it used here, it adds a lot of value to that Z-axis, which is sometimes neglected by artists. The colour theme is quite nice, and contrasts well with the background, and blends well with the render. Overall I'd say that this is a very solid work from you two. Utilize the glittering flow of points around the brush lines more. This gives of course that fantasy fell to the image, but remember to not turn it into a sci-fi space scene .
And finally the blending of blue and green works and the viewer is pulled concentrically toward the image by the blue. The green offers no movement, because it is neutral, but because of this, the audience has time to stop and gather the images qualities, before being sucked back in by the blue once again. This effect works well, regardless of whether you knew you were doing it or not.
Just remember for these abstract pieces, colours are basically your language, so you need to use it like you are trying to write a novel. Reds are confronting, greens are neutral, white is silence, but heavenly, black is silence, but brooding, blue is concentric, yellow is eccentric, and any combinations are blending of these elements. Expressing with colours is what you abstract artists should be putting a lot of attention towards.
Congratulations on a well orchestrated piece you two.