The primary argument against dual bladder wings is having to deal with an inflator failure, specifically a small leak into the backup wing. To solve that you don't hook up the inflator hose. But then you have to fumble with connecting the hose to use it, plus have the additional hose in the first place and the failure points that introduces. In the time you reconnect the QD, you could have just orally inflated.Curious - Why not use a QD hose with the dual bladder wing in this case?
I would personally just use the backup to arrest decent, then get an SMB up as soon as practical, so I wouldn't be using the wing for fine tuning anyway. Oral inflation seems to be the simplest overall method.