I think Dr Leland should've been in the Enemy Within.
To clarify I'm aware of the theory that John killed her. I don't agree with it and let's just leave it at that.
Now that the season is over I really think that Leland should've been in it. I just think it would've been really interesting as it seems that in some way that John felt some kind of attatchment to her. He constantly talks of her and reminds himself of certain things she told him that I think helped to keep him somewhat sane for a while. Plus in season 1 it seemed hinted at that she liked him. I like to imagine how she must've reacted to seeing John on the news when he was a Villain or a Vigilante. I think it would've been interesting for Bruce to see her so we could try to understand John and talk of his attachment to Bruce. Maybe we can see her again in a future season.
Please share your thoughts.