Well, here's a c-c-c-combo breaker for you: most of people browsing GAF know very well how the game is played, and what a given game is about. As such, they would prefer the cover art to be stylish, not in-your-face-explanation. Fuck, why don't we simply copy-paste ESRB rating description on the cover? Best cover ever?
Your argument gets even worse given that Child of Eden is a niche title - instead of leveraging its uniqueness and niche appeal someone at Ubisoft got delusional in trying to sell it to mass audience.
Also, the US boxart doesn't explain shit. Ok, so the game is bright? All games are. Who is that person? What are you pressing? What is the purpose of the game? US cover doesn't explain anything, and it looks 100x worse than Japanese one.