PCA and Amaya both started off very slow last season.
Just from what i've seen, Shaw just hasn't been getting the barrel on the ball much. Not getting off great swings. Getting jammed a lot, chasing some low pitches and putting them in play but not hitting them too hard.
He's made a lot of adjustments. His stance isn't closed anymore, and the leg kick is smaller, so maybe he just needs some time.
Not giving up on him, but it sucks that Cam Smith has a full run higher in WAR so far and a 131 wRC+ since May 1, and the K% is down to around 25%. We'll see Smith and co. soon in Houston.