Clarification:

If the bad cell is not completely shorted, we will see a rapid self discharge (as Red says on rcbatteryclinic site) - this is the good situation.Here our approach might work, since we have another good pack that will feed the receiver.

When a real short is present in a cell... I think nothing could be done: a short is when + and - touch, so the cell becomes a wire. It follows that all the other good cells are torn down by the short! Good pack includeded!

To resist to that event the only approach I see is using two smart regulators, that can isolate shorts.

Anyhow, I think the setup is good - as Red says, shorts don't occur in charged cells, because the charged cell will blow it away.