Not sure they could better the 1980's TV series tbh. I got it out while on maternity leave (before dd was born) and watched it again - is superb.
The book is one of my favourites and a good point on the IMDB website is that the book is quite complex and detailed, lots happens and it will be hard to fit all that into a film of 2 hours or whatever. In the 12 hours of the TV series there was plenty of time to fit everything in.
Ok, I haven't read the book or seen the tv series so maybe I'm missing something, but I saw the film yesterday and it reeked! Rarely have I ever been so BORED. Who, in this day and age, gives two shits about the problems of massively overprivileged toffs whinging about Catholic guilt? For over two hours, I might add.