Lawrence's rewritten memories of his mother's death make a lot more sense if one assumes that his childhood stay in the asylum was like his stay during the movie. All while he's tortured, the doctors keep trying to convince him that his father isn't actually a werewolf and that he was mistaken about everything. A child who undergoes all of that with the added trauma of witnessing his mother's death would eagerly grasp the explanation that he was mistaken, especially if it meant being set free.
A subtle but significant moment; when Sir John and Lawrence fight in their transformed states, Sir John tears off his shirt once the change has completed while Lawrence retains his clothing beyond what was damaged as he assumed his wolf shape. This basically reflects their contrasting attitudes towards their curses, with Sir John revelling in (and eventually succumbing to) the power of the beast at the cost of his humanity, while some part of Lawrence is able to hold on to enough of his true self that he's not quite the indiscriminate monster his father was.
Building on the above, it's not immediately noticeable, but in his wolf form, Lawrence acts a lot more like a frightened animal than aggressive predator. His first night as a werewolf, he is lured by the stag the hunters have set out for bait; it's only once he falls into their pit-trap and they start shooting does he turn around and massacre them. Likewise, the second night he's strapped down in an asylum by doctors and orderlies that have been tormenting him for weeks, and when he transforms, all he really does is try to get out of the crowded room as fast as possible, slashing at anyone in his way. When you think about it, the entire London sequence is him trying to escape Abberline. During his third and final transformation, he doesn't kill anyone, except his father in the fight. The only person he really ever hunts down persistently through the whole movie is Gwen, which has a whole other laundry list of implications. This is all in contrast to Sir John, who attacks the gypsy camp, and went out to kill Ben.
Maleva tells Gwen that Lawrence can set free by someone who loves him. Well, if she was right, that creates a bit of an inconsistency, since Lawrence himself didn’t seem to have any problem dispatching his father despite hating him. Unless he DID still love his father deep down?
I personally interpreted that comment as meaning only someone who truly loves Lawrence can set him "free" in the sense of releasing him from the curse so that he can pass on to Heaven. If a werewolf dies at the hands of someone who's just equipped with the right weapons, they die damned to Hell in the rage of their curse, but if someone killed the wolf specifically to save them, it shows that the cursed victim was fundamentally a good person damned due to bad circumstances.
In a scene in the extended edition, shortly before the first full moon after Lawrence is bitten, Sir John asks him why Gwen is not at Talbot Hall. He seems genuinely puzzled as to why his son would think it would be unsafe to keep her around. Later on, we learn that he knew that he was a werewolf and that his son was also one and still thought it was alright to keep Gwen on the grounds during the full moon. This is even worse when you consider that while he locked himself up, he made no such plans for Lawrence, meaning that there was going to be a murderous animal running around no matter what.
If this follows the tradition from Universal Horror, probably Lawrence can't find rest, and eventually can return as a cursed immortal werewolf...
Imagine if also Sir John return...
That being said, Lawrence may not return after all. The film implies that a werewolf killed by the combination of silver andThe Power of Love will move on to heaven, saved and redeemed. In the original, while Sir John does kill Lawrence with the silver cane, it isn't to save Lawrence, but to save Gwen. Assuming the remake's rules also apply to the original, that means Lawrence is also doomed to hell, hence why he returns. In this version, Gwen intentionally kills Lawrence to save him, so he can simply pass on to heaven.
Well... In House of Frankenstein a gypsy woman named Illonka killed Larry Talbot intentionally to save him with a silver bullet. And as we see in the sequels, he returned.
The first one, Gwen is bitten by the Wolfman, but she manages to shoot the silver bullet, killing him. But she survived. She is condemned with a life of lycanthropy in the middle of London City. And Aberline was also bitten. London's future seems dark.
The other is almost the same, except that the Wolfman actually kills Gwen, when he bites her throat. Apart of the horrible suffering that Gwen passed, emotional and physical pain, her last thoughts must be very devastating. She will never return with her father, she is being killed by the man that she loves, she probably think that she would be ripped into pieces and her body eaten sharing the same fate as Ben, but also, she cannot free Lawrence. She was so close, but probably her last thoughts are that she failed him. But it's not the end. Lawrence killed her true love in a tragic parallel with his father. If he survives the night, imagine what would he will think after know that he killed Gwen...
