Things didn't go bad at the trade deadline. Things went bad when Riley Greene got hurt. Whenever they have lost Carpenter, Tork and/or Greene, the lineup has become much easier for opponents to navigate. That's why they need to add a couple more good bats, especially since Carpenter and Greene have dealt with injuries and Tork's lack of performance.
Keith and Malloy were feasting on pitching with Greene hitting behind them. They have guys who can get the job done but they need more threats in the lineup.