I'm not sure which way to vote. I think one of the reasons the Compendium exists at all is that the quest to "comprehend" these games is ongoing. The main plot, for its part, I would have to agree with GrayLensman on that I had a good idea of it before playing the game at all. But you know, one thing these boards have pointed out to me time and again is that I missed all sorts of interesting details, and so my comprehension of the game is ongoing. But I don't want to say that I do not comprehend it yet, because that would also be misleading. You need another poll option, like:
"As for understanding, I endeavor because of the whole."
Which is a very cool little quotation, and would get many votes.