Did anyone else think that Andrew was maybe shooting himself in the foot just a little by instructing his tribe that the outcast who returns be voted out at the first opportunity?
If Morgan goes out of their way to ostracize their returning tribemate, there is certainly nothing stopping them from aligning themselves with Drake. In a merged tribe, this could result in a 6-4 tribal voting split (i.e. Let the Pagonging begin).
I would think that a better strategy would involve making the returning tribemate as welcome as possible and "wiping the slate clean" in an effort to secure a strong tribal alliance in preparation for the merge.