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My opinion is that Z is buying time. If the big 5 (Erasmo, Hultzen, Walker, Paxton, and Maurer) and the other big 5 (Smoak, Ackley, Montero, Franklin, Miller) don't work out, Z is out of a job. In this regard, Jaso, Morales, and Morse are irrelevant and his strategy was set years ago and has not changed.
What has set in is his preservation instinct, a preservation instinct that has him buying time. His goal is to insure that if enough of those big 10 pay-off, HE is still around to benefit from it. Or From the perspective of your prior posts, these are tactical decisions to buy him more time to let his strategy play out, not a change in strategy.
Just my 2 cents.