I have to say I'm struggling to see why the doctor would just agree to him coming off the meds without swapping to something if he's still showing symptoms of depression and that actually he doesn't seem any better. Swapping to another Anti D yes, but stopping?
Has the doctor talked him through stopping? Just stopping cold turkey is not something that is recommended. Also noting that 30mg of fluoxetine isn't the highest dose, but if he's emotionally numb then the option of changing sounds sensible... There are so many other ones though, it's definitely worth trying another...