Sure, but he's not starting in AAA, he's relieving.
That tells me he's been converted to reliever because that's what the FO has decided he is, not as some short term sacrifice to help the big club compete, as I interpreted Seth to be saying.
I tend to agree with this. As far as the Twins are concerned, Romero's a reliever. I suppose things could change in the long-term if he were to start showing command/efficiency, including a quality 3rd pitch.
The signs that he would be challenged starting in the majors have been there for some time. Was never an innings-eater or particularly efficient. Tended to fade late in seasons...K-rate took significant hits as he faced better batters in AA/AAA. A lot of us were probably mesmerized by low-level results and MPH...especially the MPH, since it's something the system had lacked forever. Still probably true that if he develops major-league command...even with just the two pitches...he's a good back-end guy. Without the command...well, that's what he is right now.