I like the snake for the dessert, I saw JessiMew's videos and the dessert was kind of boring in her Adam's Quest, not much to do, so maybe add a different predators (like snow dome) like if a snake comes it can scare you're creatures off your clan, if it's not strong enough, so you have to look for it, that could be fun.
Also add like dunes or quicksand that would be challenging for the Dessert domes.