So essentially they haven't got rid the of the dependency on 'useless' dinos that serve no purpose other than to lay specific egg types, instead you need them for their egg sizes.
I would have thought, and hoped, that feeding any dino an exception kibble would yield the best results. This would have removed the dependency on so many lower tier dinos.
When it comes to breeding and imprinting, do they ask for the new kibble types?