The only choice I can think of that does 'nothing' is your choice to pick Anderson or Udina as councilor, since Anderson will just resign and both have the same role in 3 regardless. But I'm fine with this given the role Anderson gets on Earth.
By the way, anyone else a little disappointed they had Udina go traitor? I was finally starting to like the guy in 3, and then he throws his lot in with Cerberus, though I can understand his reasons, being desperate to save Earth.