Having gone through DC20...
It's nice for what it is, but it's not for me.
As a designer, I find it wildly imbalanced between classes, with simply too little difference between some of them to create a sincere feeling of distinction. Particularly the casters who practically function identically except for one level 1 ability to try and add a hint of spice... But it's like shaking out a few grains of garlic powder into one soup bowl, turmeric into a second soup bowl, and coriander into the third when all of them are chicken consomme.
When the Dungeon Coach was doing up his Psion I went over it and compared it to other caster classes and it's just -woefully- unimpressive in design and overall power level. When I approached him with this, including analysis of power throughput and weight and stuff, his response was less than I'd hoped.
"When I create new material I always aim to keep it underpowered so I don't create power creep. If a player wants to play that class they'll enjoy it even if it's not as strong as others because of the narrative it gives them."
Paraphrasing, because my memory isn't flawless and it's been well over a year, possibly two, at this point... but yeah.
That's not a design philosophy I jive with. The idea that players should, or will be happy, to feel weak just to get a slightly different flavor is not great.
At that point just copy-paste your Wizard class onto a new page, change Verbal, Somatic, Material into "Interference, Gesture, Psicrystal" and call your spells powers, instead. Save everyone the trouble.