I dont see why there is any excuse for any well known comic to use significant amounts of old material – there are plenty of joke writers they can call on/pay if they get a bit stuck and I think many of the comics dont even write themselves.
I wonder if BC has got a bit lazy, plus he has that awful wife – his wife does a relationship advice column for one of the newspapers and its also dire. For someone trained and qualified, she gives the most moronic and shallow advice whenever I have read the column. Mel Smith seems to hate her – in an interview he said she is horrid and has spent all his marriage pretending not to remember his wifes name in order to snub her – even though her name too is Pamela so its not exactly going to slip her mind accidentally.
I think Mr and Mrs Connelly have both moved to ego over effort.