The judge seems to think the fact he has a knighthood makes a difference! Id say less that 5% of the population would have known him/told you anything meaningful about him. Id say that hasnt changed as a result of this case.
For the people that had never heard of Lord McAlpine before all of this, he's now just the guy that was involved in that children's home case. Sally Bercow is a big part of the reason why his public position has shifted from being a relative unknown to being a man accused of sexual exploitation of children, of which he was entirely innocent.
I don't see any logical progression where you can agree that Newsnight/ITV should have been fined, but that Mrs Bercow should have been found not guilty of libel.