All of this is fine of course if he is being replaced by someone significantly better.
I can recall (sadly!) when Hansen and Lawrenson joined the BBC. As a youngster, for me, they were a breath of fresh air after having to sit and watch Jimmy Hill and co for years, people that I'd just never heard of (I remember asking my Dad who they were and him explaining that they had been successful players from his past)
So maybe younger viewers feel the same now? My boys have asked me who Lawrenson is.
That said, are the people replacing them any better? Maybe they are, simply because they are more relevant to the younger viewers.