I also miss Lighter Chains the most. The unclosed story paths. The sensuality. The demon Mistress might return one day or? And Alison's discoveries about herself whenever she's with Torrin. There also could be some accident with a birth control collar one day ;)
This might be controversial, but my wish for Lighter Chains would be for Torrin and Alison to be somehow separated. Being Torrin's companion put Alison on easy street, I would love to see the whiplash of her going from complete stability with Mistress and Torrin to being on her own.
I could see her amateurishly flirt trying to find a bed for the night, participating in more public sexual activities, increasing her body count beyond Torrin, etc. Anything to put in perspective how good she had it and also expose her to more potential suitors!