Newk's improved command likely has to do with 2 factors:
1. Flowers is an elite pitch framer. Not only does this get him some strikes on pitches out of the zone, it also prevents strikes on the edges of the zone from incorrectly being called balls. The Braves are going to be building around young pitching, so framing skill should be the #1 priority at the catcher position...the main reason I wanted to pair Castro with Flowers.
2. Newk has ditched his slider and his change. It stands to reason it is easier to control 2 pitches than 3-4. He never threw the change at the MLB level, but he did throw the slider a lot in his first start. Since then he has been strictly a 2 pitch guy. He picked his 2 best pitches to rely on, so that's a good way to improve command.
Newk was insanely lucky last night with hard hit batted balls. His FIP is right around 3, and his xFIP is right around 4. Don't be surprised when the luck runs out and his ERA doubles over the course of 2-3 starts.
Everyone will start complaining about him leaving balls in the middle of the plate once the results start to reflect what's really going on.
He needs to add a 3rd pitch, and I think it needs to be his change. That won't happen until the offseason, so until then, folks need to refrain from souring on him when he normalizes to a ~4 ERA in the upcoming months.