Well, apparently a predominant number of the players who responded to the surveys for latest Psionics playtest document have said they don't like the Psionic Talent die. They liked the ideas of the Psi Knight / Soulknife/ Psionic Soul subclasses... but having there be an all-new mechanic to learn and use was voted down quite a bit. Jeremy Crawford doesn't say the idea of the Psionic Talent die is now dead... but that they have to go back and figure out if there's a way they can do both... make psionics work more like everything else in the game (which most people apparently said they preferred), while also trying to please the populace who really enjoyed the new mechanical expression.
PSIONIC OPTIONS REVISITED
PSIONIC OPTIONS REVISITED