I'll agree that Elfin is an EXTREMELY think parody of Sailor Moon, but culture references are just a part of most TV shows. Lucky Star is so successful partially because it's loaded with these.Heck, even Winx Club had an insanely thick Gachaman parody once...as obscure as that sounds.It's because it's funny as quite a few people will get the reference seeing how widespread Sailor Moon is in the US.Then again to me Elfin V2 has a little Shiny Luminous added to the mix as well. We'll see if she's still stuck with Ventus or if she takes Haos and does a "Hartiel Action" or not.
<- Shiny Luminous from Precure Max Heart