Earth's weakness, it's lack of arrogance and capacity to suck up to get their hands on better tech was perhaps what they most brought to the table.
I might have liked to see more real aftermath of the Temporal War by following up with Enterprise being dragged into a Suliban Civil War.
the Network forced the war on Berman, and then forced the resolution on Berman becuase "You're not doing it right! Why arn't you doing it right!? Oh just stop, stop even pretending to try you muppets!"
Meanwhile, if Archer was Future Guy, doesn't that mean that he was encouraging the civil war by being a super prick on purpose, and thus betraying his allies? He knew it was doomed and liked it that his forces where going to splinter and fade away.
A self cleaning weapon.