As much as I hate it, when my nichelings get a derp snout, I think it's important for the gameplay.
As the derp snout is no health or functional issue, only a beauty problem, we have to choose, whether we want to get rid of the derp snout or rather blindness, crippled paws or hemophilia. That makes the game challenging and let us think about, what is more important to us, beauty or functional issues.