Baseball America's article goes into pretty good depth on Adam but I'd point out one thing:
"Adam’s success or failure is largely tied to his delivery. When he gets too upright in his delivery and gets too mechanical he leaves his fastball up, it straightens up and becomes quite hittable. He has three games of seven or more runs allowed this year and he had five games of seven runs or more allowed last year.
But when he drives off the mound and gets extension, he gets just as much if not more velocity (92-95 mph) and generates good sink on his fastball while locating down in the zone. Adam added a slider this year, although at its best, his downer curveball is more effective and is usable both as a strike early in the count or as a bigger breaker when he’s ahead of hitters."
May had a similar problem when we got him - while tall he pitched short and the ball came in high on a straight plane, letting hitters square up better and/or letting the ball fly out of the zone. It took a couple years, and repeating AA, but May has gotten a lot better with that. Perhaps the Twins see a similar tweek in Adam and can turn him into a solid starter. BA also wrote that "The Twins are getting a great lottery ticket. At his best, Adam shows two plus pitches (his fastball and curveball) as well as an average changeup and a slider that could develop into an average pitch and he does it all with potentially average control."
We have three more seasons where we can stash him in the minors while he works on mechanics/control.