After some considerable play time, I've knocked together an almost comprehensive unlock guide, to see in one place, waht you need to do to unlock which buildings, dinos, upgrades and cosmetics. Just thought it might be something folks found helpful
http://pixelbandits.org/2019/02/jurassic-world-evolution-unlock-guide
http://pixelbandits.org/2019/02/jurassic-world-evolution-unlock-guide