Paul Farquhar
Legend
I think there is a lot of low hanging fruit for the Sorcerer and Warlock still left to pick, but, yeah: most of the ideas in this thread are either narratively esoteric or mechanics driven.
Yup, I do wish people would stick to the original premise of the thread: "what core concepts are missing" rather than "what whacky idea can I come up with". Both 2nd and 3rd edition (and pathfinder) descended into wackiness in order to sell books, and every "nethermancer*" proposed weakens the strength of the core argument.
*Judging by the name, I assume this is a wizard who is an expert in talking out of their nether regions.