it’s actually 4F LN in most cases. especially in aggressive decks.
and even you break flower with FB or command, sometimes it’s not counter play because your creature is moved to useless position. so flower performs as a 4F-2F(command, cheapest way to break flower) = 2F movement trick at least.
Crystal flower is neutral card, so it is auto-included in every deck if it’s OP and now various kind of tempo, rush and burn take this card into their lists. The reason is, again, it’s actually 4F LN in most cases.
So we could change flower to an inferior version of LN (but every color could use), just change flower’s cost to 5F or 6F, or limit the range of swallow ( ex) can swallow the creature in adjacent place only) so flower is similiar but different than classical hard removal.