User blog comment:Tvirus1234/Don't Fear the Reaper: A major flaw of Mass Effect 3/@comment-62.107.185.135-20130713001155

To be fair, Sovereign had a different objective then the Reaper fleet as a whole. Vigil told us that Sovereign was a bit "scared", because it was alone, with the rest of them trapped in dark space. So during the attack on the Citadel, it had every reason to use all it's power to destroy those attacking it. When the rest of the Reapers arrived, their position changed. They clearly had the upper hand in all departments; Size, numbers, lifespan, offensive and defensive capabilities, so they could afford to take it slow, since their numbers remained almost the same, while we were pretty much down half the galaxy in only a few months...