Don't you? I can think of three moments of actual C&C in the entire game. Two of which were on the same (penultimate) planet, and the third was the five-minutes-before-the-end "choose your final cutscene" choice.
I think that (possibility) there are more than three moments of C&C (Cerberus mission, rachni liberation or not, etc). We can't see all the consecuences until ME2 and ME3.