Unfortunately, it's the standard treatment of Psionics in D&D 5e. Which, in my opinion, is basically no treatment at all. They did do a short playtest for the D&D 5e 'Mystic', which was going serve as the Psionicist for 5e, but no one was happy with the results so they scrapped it. However, the Mystic didn't really capture the feel of the Psionicist from prior editions, so maybe that's for the best. You can search for Unearthed Arcana: The Mystic Class, if you're curious about it.
