So your contention is that the benefit of common-mode rejection inherent to an XLR connection may provide an advantage over single-ended connections in some cases?
No, that is not what I was saying.
By "common mode rejection" I assume you are referring to rejection of common mode noise, i.e., noise that is picked up equally in the two signal conductors of a balanced cable, which can therefore be rejected or at least attenuated by a balanced receiver circuit.
But note that none of the seven factors I referred to have anything to do with that, except perhaps to some extent in the case of number 6.
Regards,
-- Al