D&D 5E (2024) Psions, what would the Seer and Shaper look like?

[Yaarel]

That runs into to problems it is just the diviner but better and thus never getting past wizards and also sounds very hard to balance.
also letting wizards having diviner the origin of the term mancy seems logical.

Divination is generally too passive for a D&D class. Teleportation is a one-trick-pony. But the combination is worthwhile as a well-rounded D&D character concept. Spacetime is interesting and explanatory.

Someone will use it to make personas from persona real or the archetypes from Metaphor: ReFantazio

Maybe. But like a dream, the personas of a Shaper are more uniquely personal, idiosyncratic, and less like a recognizable cultural archetype.