Err, why are strategic, tactical considerations not valid, 'good' reasons? Fears of tokenism and possible backlash are both things I promise you that Obama's camp are going to count as potential downsides. Lack of foreign policy credentials is another possible downside.
I understand your point, but I am horribly optimistic that Obama can make the case for her, since her being a blue gov of a red state underscored Obama's unity message.
No tactical considerations are a recipe for defeat. Those Clinton supporters who are yelling sexism will be satisfied with nothing but Clinton who will upstage Obama and make him look weak. Those woman will only support Obama if he picks Clinton. So they will yell Tokenism, they are yelling sexism today. Obama needs to move on and pick on qualifications not on tactical nonsense. To win the Presidency, you need to appeal to the center not the fringes of either party