To me, he was JW's version of Gollum, albeit one who survived when he maybe should not have.
Probably the reason why
he survived. Andrew wondered, in the finale, why he wasn't the one to have died: that would have provided the appropriate narrative closure, redemptive death, to his story so far. But Andrew's S7 arc was about not
treating life like a story, and surviving the final battle when more 'deserving' characters didn't was just another way of disrupting the expected narrative, for the character and the audience.
What, me over-analyse?
Creditorly yours, the Rent Woman