Charisma is the right stat for Psychometablism I say. It affects the self, harnesses the ego, and so on......it's not ideal, but then, Psychometabolism is wierd in 3rd edition and psionic powers shouldn't be directly Charisma-based anyway, other then stuff like psionic defenses. Psychokinesis belongs with Intelligence, as it deals with fine manipulation of the world around you, modifying and controlling the most minute aspects of everything, and utilizing knowledge of how things work, and so on. Psychoportation belongs with Wisdom because Clairsentience already penetrates the veil of time and space, as does Psychoportation, and PsyPort involves awareness and recognition of the surroundings, an intuitive understanding of space and time, and being able to move from one location to a distant place, even extraplanar, that might not have even been seen before by the individual.
That said, I preferred 2nd Edition psionics, despite their complexity.
![Big grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Some powers were based on Constitution (like many PsyMet and Metapsionic powers), some on Intelligence, and some on Wisdom... And 2nd Edition explained the concepts of psionics very well, and the powers mostly made sense. 3rd Edition adds wierd shapeshifting, matter-creating, and other powers that just don't belong.... Regardless, long live D&D psionics !!