I would say the Alien movies were all more honest attempts to expand the lore than Terminator 3, 5 and 6. Each of those is just a crappy remake of T1 with most of the intended appeal or draw being whatever gimmick is new for the bad terminator. T3 ohhh it's a woman with an endoskeleton, T5 ohhh it's John Connor, T6 ohhh it can split in two. I guess I am saying that the people making the Terminator movies don't even think they have to expand the lore for its audience, they think that pooping on the camera lens will do as long as the bad Terminator has a new feature of some kind. T7 it can split into THREE terminators.
As you know, T5 and T6 both undo the existing lore to shoehorn a reason for their existence into the story. At best they are lore replacement, certainly not an expansion.