The spoiler's spoiler behaviour doesn't work with the spoiler's design
Mods removed the original post with hundreds of comments because apparently the name of a leviathan is a spoiler, so to all the people who made compelling and insightful comments in response to the post, sorry your discussion is lost to time.
Original Title: The Shiver Leviathan's pack riding behaviour doesn't work with the creature's design
Title is a statement, but really this is just my opinion. Feel free to disagree.
I am not sure what the consensus opinion on the Shiver Leviathan is, but personally I am not a fan of its implementation, and that largely comes from the creature's sexually dimorphic pack riding behaviour, where the smaller males will ride the females.
In the current build of the game, the way this behaviour works looks incredibly unnatural, as the males essentially snap off the female to chase the player. They then turn around, homing onto the female's position, and then snap back on. It looks very strange, but I understand that this may just be because the creature's animations have not been fully nailed down so far in early access. However, I don't think the unnatural look can be fully attributed to it being unfinished. Personally, I don't think the pack riding idea works with the design of the Shiver Leviathan.
We know the Shiver Leviathan's design wasn't created with this pack riding idea in mind, as the concept art was revealed and explained by the developers prior to release. The original concept art was designed under the idea of it being a solo predator, which was then revised when the developers began experimenting with the idea of it hunting with a pack of juveniles. However, this redesign for the pack hunting behaviour still didn't envision the idea of the smaller Shiver Leviathan's riding the larger one.
I say all this because what I find off about this behaviour in game is that the Shiver does not look like it is meant to have this behaviour. The individual design of these creatures looks good, but when you see them stacked on top of one another it looks very strange. Not strange in an alien design sense but in that it looks like a mistake. Since the design doesn't take into account how the males would latch onto the female, they just strangely float above it yet are able to mimic the female's exact movement, direction and position as if they were actually grabbing onto it. The males have to snap back to the exact specific position on the wing so that their outstretched wings don't clip into the female's body. The wings of the female have to remain static and outstretched because there is nowhere else for a male to fit on it once one is on the back. This significantly contributes to the unnatural look, because the static animations of the creature are now mandatory so this pack-riding behaviour can occur. Since the wings cannot be animated, the only part of the body that moves differently between the four is the tail, which a player is not going to be able to see very well as the creature attacks them from straight on, so often it looks like all four creatures are identically moving towards the player with incredibly static movements, like its animation is failing to play, rather than looking like four separate living creatures.
The idea of smaller males riding a larger female in a pack is a very interesting and unique concept for a leviathan, but I feel for this concept to work you would need to design the creature from the ground up with this idea in mind and incorporated into the design. I personally don't think the Shiver Leviathan's design is suited for this behaviour.