Locked in syndrome - the waiting room for death?

I read a short story last night called "Mind cafe" by Lizzy Ford. (I do find all sorts of things when searching the books and short stories that are on offer for free download for my kindle.)
This is an original short story. The mind cafe is the inner world - a room with leather sofas which Rosie imagines that she lives in since she has been paralysed by an accident 24 years earlier. Since then she has been living as a vegetable. She can only communicate through complex technology that involves moving the iris of her eye. She looks out at the room she is kept in but prefers to be in her imagined inner room which is the waiting room for death. 
Various characters visit her in this inner room, some living, some dead and one imagined from the photo on the back of one of her old university text books. 
She has been in this state for years waiting to die and so has become resigned to her fate. She is looking forward to the day when death will let her pass through the door in her waiting room to join her mother and sister who are waiting for her. She believes that they are on the other side of the wall of her room waiting with Earl Grey tea on the veranda.
It is a thought provoking idea, but could have been more fully developed. There is little about the immense sense of frustration at her imprisonment. This is only lightly touched on as she articulates her moans about the lazy nurse/maid who is supposed to be her carer. But then it was only 5000 words. 
It made me think about being imprisoned in a body that had no functioning parts (as in "locked in" syndrome). The story also resonated with the discussion I had taken part in recently on assisted dying.