I think the repeal of DADT will have more repercussions than anything else. It’s no apparent now, but given time it will destroy the moral of the armed forces and cause the need for a draft.
And a draft will do damage in ways that a professional soldier would be glad to tell you about. The more highly trained the forces, the more of a liability the "conscript syndrome" becomes. Yelling isn't a magic wand.
At the very least, shifting back to a conscript-fed military will cause the death toll to skyrocket. One of the reasons why the death toll for post-Vietnam wars has been so low, relative to Vietnam and before, has been a professional all-volunteer army.