It should be reminiscent of the previous ones however for the fans thereof. Not mirroring exactly, but being reminiscent. Let's not forget the test when they did that dragon sorcerer. A fine enough class as it was, but so completely unrelated to anything the sorcerer had done previously that people were just confused.Insisting that psionics HAS to mirror earlier editions is a non-starter for me. No other class does, so, why should psionics be any different?
The UA one is just a wizard. Psionics aren't just wizards. The sheer amount of people unhappy with the wizard school (And pretty much the big constant between my usual haunts is people not being with that being the psion) shows it failed to get people's idea of what the Psion should be down
Mind, I'm a fan of the "Grab the monk's Ki point stuff, rename to Psi points, hook it onto caster chassis of your choice, go nuts" school of getting them into the game