Cousins to me would be a terrible investment as a max contract. Sure his numbers are great, but he doesn't seem like a guy who will lead you to the promised land. I'd rather strike out and build another year than make that commitment to him.
He seems to have the highest floor in the draft. I would say it sounds like he is as much of a slam dunk to make the majors as you can get outside of a generational talent. The thing missing is the big ceiling. I mean what is his top?