I really like your ideas OP.
I have an anxiety disorder and depression and I find that when people who haven't had it describe it, they don't really seem to understand what it is.
It would be really nice if the gurus could open up a thread - if they are seriously considering this - where we can talk about our disabilities and our experience with them. What it looks like and feels like. For example; a lot of people think about anxiety disorders as constant severe panic attacks and breakdowns. But I guess in a sim what it would look like is more frequent tense emotional states from being generally overwhelmed, avoiding going outside because it's just too much, fitful sleeping and nightmares, having a ritual when I'm alone where I check all the windows of the house so I feel safe, making very few friends, and avoiding social situations.
Also when I do have an anxiety attack it doesn't look like a hysterical fit, it's more I sit with my knees to my chest, have laboured breathing, will want to visit a hospital, and I will shake a lot. Like a chihuahua.
It would be really nice if they include cognitive issues if, as you said, they include some sort of UI where we could pick what kind of disability the sim has and the specific traits of the disability. Perhaps in anxietys case there would be a severity slider (for how often the symptoms come up. So that way you can have a mild or severe case) and check boxes for anxious behaviours/symptoms.
It would also be good if our sims could receive support or assistance for their disability symptoms like we do in real life. I wouldn't want receiving support to make the symptoms go away but I'd like to show a sim learning to cope with whatever their disability is. I have a nephew with autism who has his own teachers assistant at school and goes to special sessions where he learns coping methods.
From what I've seen it's really helped him with food aversion and calming himself down when he gets overwhelmed.
So I think it'd be good if that was included.
