As it is now, genetic engineering in JWE only alters stats or skins. It doesn't change behavior at all. Perhaps a good idea is that certain genes can truly impact behavior! In JWE 1, the closest that comes to being this is the Comfort gene but what if it was more nuanced? The Agressive gene, for example, could make animals more likely to start a fight even with their own kind or challenge for dominance more often, where is the opposite could make an animal super chill and relaxed. An intelligence gene, similar to brain aging, could make animals smarter in how they approach their escapes and maybe even scheming, like testing fences over time, staying out of view of cameras or maybe even making a run for the open gate when a ranger comes in!