I think air/light are not distinct enough.
The new Light pillar art is quite distinct for me. The white light coming from the sun reacts to the low density molecules of nitrogen gas in the atmosphere, resulting in the blue light being absorbed and scattered as a good portion of green and red light being constant. So, it explains why the pillar is high in the sky and on a cloud (things that appear white reflect a lot of light).
Compared to Light, the new Air art seems to lack the depth in color and slightly holds true to the air theme for me (partially because air seems to lack identity in Elements and often just acts as a supporting role). I see what you mean on needing distinction for the air side, simply because it doesn't really show air in action. Probably a pillar that was in a shape of a tornado would of been much more suitable.
Or, I may be overthinking things.