I disagree. Ball was considered a much lesser talent as a hitter than he was as a pitcher. The success rate of high school position players who project as 2nd round or lower pick, is very bad.
Even if all Ball is, is nothing more than a #5 swing man starter type, that is still tremendously more valuable than a guy who never makes it to the majors.
Also, he's lost a ton of developmental time with the bat, and that really matters a lot to these young players. It's also much easier to switch from hitting to pitching than it is from pitching to hitting. For these reasons when organizations bring in two way players they often have them hit first because if they fail there it's easier to move them to the mound than the other way around. A perfect example of this is Bobby Dalbec.
I think we have to shake off the 1st round pick shine from this kid and take him for what he is. If he has a chance to be a MLBer as pitcher, even as a 6th or 7th inning reliever then we keep him there.