I have no clue either. Judging by the parent post I guess it's something about the color pattern? I don't quite see what it's doing in the Awesome Mecha pool either for that matter. I'm not getting a particularly awesome vibe from this at least.
I didn't assign it to any groups, but I could see clever. The joke is that it's painted up like the EZ-8, which in one scene opened up all its guns in a Heavyarms-grade gatling spam.