Not to nitpick, the Schwellenbach was a top 100 guy and the Braves were rumored to be considering him in the first round. In fairness, he was pretty much viewed as a top-end closer by most services, but the Braves have done a great job with a lot of the pitchers they draft (going way back) and moved him up through the system patiently and that has borne fruit thus far. Fangraphs was the only service that had Harris ranked. PG Crosschecker liked him, but a lot of teams saw him as a pitcher.
The Braves have this uncanny ability to take guys that most rank in one category and go counter to that and have success. Like Harris, Klesko and Riley were both thought to be pitching prospects by most. Schwellenbach, like Kris Medlen, was a shortstop who also served as a closer for their team and the Braves turned them into starting pitchers. There are more examples.
Always hard to know with a draft. I think the scouting and player development staffs have looked at the paucity of offensive talent in the system and want to rectify the situation. I clearly know sh*t about how the whole bonus pool thing is being approached because in the past I've thought guys like Hackenberg two years ago and Hernandez last year looked like below-slot guys and neither was.