The reason why it didn't have wings in Sm4sh was cause it never did to begin with. They only added them in other entries cause everyone complained about the idea of the blue shell being able to hit all the players before the first, and then it was added back in Mario Kart 8 cause they realized that was a silly thing to remove. It makes perfect sense for it to hit all the players, as opposed to just flying around and hitting one player.
I like the idea here, though, given all it does is fly anyway and it's not hitting all the other players, but I'd be sad if it didn't have flapping animations and moved around like it did in other entries. Then again, that's impossible to mod, so I suppose this is all we got.