Happ OPS'd .971 in May, I think we keep him in the lineup - he still has an OBP over .300. Not having a good year, but has easy potential to break out - has been struggling with balls into the shift.
Jhey is likely still hurt, which sucks he came back early. But, there isn't another option - Ortega isn't any good and they are out of decent options to replace him without trading. He might get the fake IL stint if the Cubs can swing a deal for an OF bat soon.
At some point, having so many injuries was gonna catchup. Cubs backup catchers are 5-67 on the year (Wilson Ramos?). Nico and Duffy added a different layer to this team of high contact, low K guys - not sold on Duffy keeping an OBP over .375, but can't be any worse than Sogard or Bote this year.
Pitching was key to the run in May, need to have consistent starters - which Hendricks and Davies and Alzolay had given.
Cubs need something, either another consistent pitcher or impact bat - but not that far away from being able to run away in the central.