I've been slowly making my way through the career mode. I have been loving it! I am currently on the scenario in Brazil with the Quarry which has been fun. I love the characters (Dominic makes me laugh), I love the different maps and the overall story line so far has been A+. I enjoy working with a goal in mind while also being free to spiff up the Zoos to my liking.
I was really happy to hear about new campaign scenarios. I hope we get new ones for every DLC (and maybe some fun free ones! OR being able to create custom scenarios that we can share on the workshop) Too many times these kinds of games make the career mode and then never touch it again.