Tomas Alfredson is one of the active directors I like most, even though I have only seen two of the five films he has directed. It's a shame Alfredson's animated adaptation of an Astrid Lindgren novel won't see the light of day. He'll now direct the adaptation of a Jo Nesbo's crime novel and, although it may be another good film, I fear he becomes typecasted to Bond and Bourne films; however, he seems very careful with what he chooses to do.
I really liked Tinker Tailor Soldier Spy, but I'm not aware of its shortcomings when compared to the tv series or the book. Were there important events to the story not present in the film? I understand the limitations, and in these cases it becomes a game of how well the director chooses what to sacrifice. However, what you've put under spoilers shows that some things were not ignored, but wrongly adapted; if I had seen the series before, I wouldn't like that either. Do you think Oldman was asked to make an impression of Guinness, or was he intimidated by the role?