I think a really cool feature (probably more for a sequel, but that's another story...) would be if each genetic had an unknown side-effect. It's quite clear that Wu developed the dinosaurs of the Jurassic franchise with the best intentions, but it was the unknown side-effects which caused the chaos. Tree-frog DNA allowed the supposedly all-female JP dinos to change sex, but this wasn't known until it actually happened. Same with Indominous - bred to withstand an accelerated growth rate with cuttlefish DNA, they didn't know it would have the effect of enabling the creation to camouflage. I think if Frontier could do this and overhaul of how the genetics work it would add some spice to this part of the game and give us more reason to try out different combinations. You could have some genes actually counteract the side-effects of others too. I think this would be more fun than pre-knowing what's gonna happen before you even incubate the dino?
I love this game, but I've hardly used some of the genes because they a) don't actually change the dino's behaviour and b) they clearly aren't an advantage in terms of obviously causing more breakouts. It would be great to see more tailored animation sets to bring the genetics to life AND give us a more fun way to play around with them..... sure add that shark DNA to give your dino super-long life span/resilience to disease, but it would be cool to see some side-effect like increasing metabolism too meaning they become noticeably hungrier. Or if we use the dragonfly 'strong muscle fibres' gene to improve attack, defence and resilience then it adds a wetland need even if not a spinosaurid as dragonflies need that kind of habitat.