As a person who is studying psychology and is very concerned about human physical and mental health, this topic really attracts me so much...
You have explained why gmk CC and GMK CP are choosed, I think they are very appropriate. I am not very good at design.In my humble opinion,the design of the novelty keycaps has some homogeneity .if it's possible,try to add a few R2 novelty keycaps, eg:the backspace can be designed as "Psychosis" in special typeface.maybe handwritten font?another novelty keycaps can be designed according to some pills such as Chlorpromazine,Haloperidol etc.Even elements of Richard Freiherr von Krafft-Ebing or Sigismund Freud could be considered.Delusional elements could be added more?
Could separate the numpad into another kit?
hope u will understand my idea...my english is so poor...
anyway,it's nice work. Just take my money!