Sonny Gray gets called a "solid #2 starter" in this thread but he's pitching as well as anyone in all of baseball - leading the league in ERA and #2 in pitcher WAR. The starting pitching has been very good.
For the offense, many people commented that Gallo might be a good piece to pick up if they didn't already have 5 other players with the same skill set on the roster (Kepler, Larnach, Kirilloff, Wallner, Julien). That feels like a bug in the spreadsheet. Lefthanded hitters who can put the ball over the fence are valuable, but having 5 of them is not as valuable as having a mix of different skill sets. If an opposing pitcher can get one of them out he will be able to get ALL of them out.
They decided Miranda was their starter at 3B and that decision isn't helping. They knew (or should have known) coming in Miranda's glove would be below average but were betting on his bat. Carlos Correa is definitely underperforming at the plate but I doubt he is this bad all season. Those two (and Buxton) were supposed to provide the RH hitting to balance all the lefties elsewhere.