He does have his lowest K/9 rate in his career (6.6), but his BAbip (.260) is about the norm for SP'ers, this year, so I'm not sure he's been getting lucky.
His FIP is one of the worst, among the leaders, but that low K rate will do that to anyone.
The 23.2% LD% is one of the worst, but it's better than Gausman and Houser. Wacha's hard hit% of 30.7% is about middle of the pack and is better than Framber Valdez, McClanahan, Bueler, Pivetta and many other good pitchers, this year.