I'm not sure if it was the neuter or if Griffith just took a lot longer to settle and learn to trust people but he's become so cuddly in recent weeks it's amazing, he's often cuddled up next to me or on my lap and if I say "Griffith cuddles" he comes running jumps on my lap and starts purring away. Before he would only come over if Arya was with me and would kinda cuddle up to both her and me but now he comes over on his own and actively seeks out affection from me. He will only be like this with me though he's still quite skittish around other people, thankfully Arya adores everyone so she tends to entertain guests whilst Griff stays with me.