In some ways, I'm more interested in seeing who the Orioles gets a shot at at #30. Hendrick? Casey Mears? Jordan Walker? Austin Wells?
There's about a 1-in-10 chance of a player drafted around #30 becoming a regular and 1-in-30 of becoming a star, at least based historically on how well players taken at the end of the first have produced for their careers. I'm defining regular as >12 career WAR and star as >30. And roughly approximating the odds based on the results at a couple picks before and after. I guess the math changes on a case-by-case basis, and if you think you're getting a top-15 talent at #30 for signability reasons then things could change. I'm talking long-term trends, not specific players in this year's class as you have mentioned.
It's an interesting conversation of whether you'd rather have slot-type signings at both #2 and #30, which basically gives you a 1-in-3 regular (1-in-10 star) and 1-in-10 regular (1-in-30 star), versus going underslot early and overslot late, which could give you two guys who have true talents in the low teens. So maybe you end up with two guys who each are a 1-in-4 of being a regular and 1-in-20 shot at being a star.