To widen the discussion a bit (I don't listen to the Archers, but I think that this is an interesting thread), Peter Barlow in Coronation Street is also suffering - maybe dying - from alcoholism. I think the story has been handled well so far. He has always been a heavy drinker, and was diagnosed with cirrhosis after hitting the bottle again. He managed to stay sober for a long time, but difficulties in his relationship led to more binges, and he is now on the transplant list for a new liver, despite having been 'on the wagon' for six months or so.
When other soaps have dealt with the topic, the sufferers often reached peak alcoholism very quickly (usually over months rather than years) then either get a new liver, like Phil on Eastenders, and recover pretty much immediately, which is not realistic at all, or they go to a couple of AA meetings, like Linda (also Eastenders) and the plot lines move on as though nothing had happened.
I don't know what the outcome of the Corrie storyline will be, but either Peter will get a transplant or die waiting, so is already shaping up to be more true to life than usual.
I know it is entertainment, but I think it is better that viewers are shown the reality of drug and alcohol abuse, rather than see characters drinking until they need a new liver, get on immediately and then carry on as normal.