One of the newest additions from the latest Malta DLC, the Lystrosaurus, has become one of my favorite attractions to house in the parks. Being the 2nd non-dinosaur terrestrial animal, the lystrosaurus is a tiny herbivore that lived in the Early-Triassic Period as potentially one of the most dominant creatures of that time after surviving the End-Permian extinction, which makes it stand out a lot from the roster. Besides that, they are awfully cute with their small size, bulldog-like posture, playful social animation, and very fluffy eyebrows.
One thing when looking into lystrosaurus was that it may have survived the Permian extinction event thanks to its burrowing lifestyle, which makes me think that it would be cool if we could see the lystrosaurus exhibit such behavior in Jurassic World Evolution 2. As is, it is one of the tiniest herbivores in the game, if not the tiniest, and if they were to burrow, they could occupy a niche not taken in the current dinosaur roster, making the lystrosaurus stand out more like a prehistoric meerkat or wombat.
Planet zoo has such a behavior implemented with the likes of Meerkats from the Africa Pack digging tiny holes to hide in, and placeable animal burrows later on in update 1.8 alongside the launch of the Europe pack where you could observe the animals inside the burrow, as that acted as a shelter for your animals to sleep.
I think there is a lot of fun having your lystrosaurus build its own burrows. It could integrate with the territory system where they would situate burrows in their territory to use as tiny escape shelters from predators, tour trucks, and stampedes. It could also bring about a unique challenge in dealing with these animals since they may hide in burrows to escape medical or tranquilizer darts, which would require that extra level of care not to spook them to run for the burrows. Plus I would melt if I walked in first-person mode, walked and peered into a lystrosaurus burrow, and see their tiny heads pop up to see if the coast is clear.