Yes! One of the things that annoyed me most was Easterbrook's wife (forgot the name - Hermia?) was shown as a housewife slaving away in the kitchen making canapes. Agatha Christie portrayed her as a bluestocking, working as a journalist or academic doing something very highbrow. If she had married Easterbrook she would have insisted on having domestic help and/or caterers for a function like that. Wouldn't most people of that class have done that in 1961? They're clearly not short of a bob or two.
Many missing characters so far - the vicar's wife is a loss. And why make Mark Easterbrook sleep with Thomasina instead of just observing her in a cafe? The cynical amongst us might think it was engineered to create a scene where Rufus Sewell could be seen in a state of undress. 
'Much Deeping' didn't look like a Surrey village at all, so I wonder why they decided to locate it in Surrey, given that the book says it's in Hampshire.
Etc etc etc. Sigh.