I've been fantasy BB for a long time. Having rookie pitchers come up and dominate is fairly common.
But every year, without fail, there is a rush for a few elite hitting prospect. Their success rate, in terms of immediate fantasy value, is usually -0-. Guys that I thought had flawless minor league resumes, like Holiday and Rutschman, always take time to develop. Even guys that are great just one year later, usually struggle as rookies. I think James Wood has one of the best swings I've ever seen, and he didn't hit anything in the second half. And every team has a guy like that.