Unfortunately, "what you see is what you get" and the only way to keep an AOD in 2nd is to do that 1-2-1 shuffle. It's very hard on the trans, so ONLY do it when racing, then as seldom as possible. However, check
www.lentechautomatics.com for their street terminator lockup valve body, I do believe they've gotten around that where you can "shift" 2nd if I remember right.