Now i know JWE2 is no longer doing breeding for the park, but breeding aside, sexual dimorphism could open up a whole world of possibilities and is also just a really nice thing. When you go to a zoo its so cool to see the male lion among all the females, when you have mountain goats or bulls its cool to see them headbutt or compete over females, watching the male peacock preen and strut, or just seeing the animals being affectionate.
Now it could be as simple as just different skins ( brighter and more colorful for males, and duller for females), a light tweak to the skeletons ( smaller horns/crests on females, larger horns/crests for males) to a larger change, like social interactions ( males being aggressive towards each other and competing for females, bachelor and all female herds) and new challenges ( having to take out an old herd boss and introducing a new one, to many males in a pack, the older female T-rex keeps killing all the males you try to pair with her)
Now it could be as simple as just different skins ( brighter and more colorful for males, and duller for females), a light tweak to the skeletons ( smaller horns/crests on females, larger horns/crests for males) to a larger change, like social interactions ( males being aggressive towards each other and competing for females, bachelor and all female herds) and new challenges ( having to take out an old herd boss and introducing a new one, to many males in a pack, the older female T-rex keeps killing all the males you try to pair with her)