Ultimately, I want an elegant psionics system not only because I really like the idea of psionics as a concept, but because I'm bored of spells all the time. I want something a little different. I want a little extra spice. You don't have to like it. Ban it at your table. There are people who ban artificer too for flavor reasons from their tables. I know at least 4 tables that only use non-spellcasting classes and subclasses and run games in literal ancient Rome.
So, I want a Psychic or Psion or Mystic that has unique psionics mechanics that let me explore the themes in a new mechanical way. I don't really care to entertain the people who don't want that, because it'll be in a non-core book and you don't need to allow it at your table even if it is in a core book. That simple!