I haven't played this game since last winter and snooping around Steam to check what I missed it seems that some people are mightily unhappy with Common Sense expansion. Its all well and good and not really my problem, but some of the user reviews mentions that ability to develop your provinces (like building buildings ?) are patched out and not available without buying this expansion and that AI is using new features in your game while you are not allowed to do so. I won't be able to play until weekend so not like I can check, but is it true that you are pretty much screwed if you don't by this? If so what is the last version non Common Sense owner can play?