#54 (+ other 2) are our favorites. Color scheme is better in #54. It does look a bit more complex than it should. Could you experiment with simplifying the "E". Perhaps while also making the whole thing a bit more subtle, maybe less broken pieces and lines?
Also try getting the C into the design (but keep the design separate from just "e" one).
Another thing that comes to mind is trying simpler fonts for the "earthcape" part. Perhaps, going into stylizing the shapes of the letters into very simple ones.