Hall and Ashby have been frustrating but there is still a chance for both of them. Hall has a lot of team control left and if his fastball can get back to where it was, he can be effective (though IMO out of the pen is the likely destination, which is disappointing).
Ashby's contract is the risk you take with any pitcher, though it's hardly crippling the team. He's making a little less than $3.5m this season, which is about one-tenth of an Anthony Rendon.