I think that would've been a nice surprise from a stupid fight. Or imagine maybe, that it started out as a physical fight between Luke and Kenny (so you'd still have some action at the end if that's what TT was going for), but then that conflict devolved into nothing, and it did turn into this quiet decision like you said--who would you rather go with, as for one reason or another, the two men wouldn't travel with each other anymore. I think another problem too would've been deciding who the baby went with too tho. Maybe Luke would've thought Kenny could've used AJ to keep Kenny going and living, but I think Luke might not trust Kenny with the baby either. Perhaps that could've been a second major decision in the game too, and would've added another little surprise.