I can only agree with that.
Unfortunately, this not only applies to the Therizino, but also to so many other species. why are e.g. Lystrosaurus and oviraptor not eaten by large and medium-sized carnivores, but homalocephales are?
Or why no herbivore has a finisher animation like they had in jwe1?
Also, small 4-legged dinosaurs (chasmosaurus, kentrosaurus ect.) have neither a death animation nor an animation for killing.
Overall, there are still quite a few gaps to be filled. It would be nice if something was added later.