In Cubs farms past, prospect pitchers never got pulled from the rotation unless due to injury. I kinda like the developmental concept that if something isn't right, that you try to remediate ASAP. Palencia walked 14 guys in his first 16 innings; maybe getting him away from games and trying to ID and remediate why he's missing so badly so often was exactly what he needed? Jensen's awful, 14BB/16IP, and his habitually bad HR-factory is even worse? Try to remediate ASAP, try to fix him. At least try, I'm good with at least trying. Probably Jensen just doesn't have it in him to consistently throw strikes, much less do so with command. And probably Palencia had a fluke walk-free game, but he probably won't be able to locate with consistency over a larger sample size, I get that. But I like trying to develop and remediate right away. From a totally different perspective related to behavior therapy, research shows the best error correction is immediate, direct, quick, and ends with the learner making the correct response. Sometimes that means teaching in isolation. If the Cubs are doing that with pitchers (and I hope hitters, e.g., Davis is at the Arizona complex), they may be on to something.