I loved 2nd edition Psionics. The only think it needed was to be slightly simplified, to make psionic combat interesting. Third edition failed in my opinion.

What always works (if needed) is that Second Edition Psionics works with pretty much every edition as its based on a characters statistics.

But we’re destined to see something added for 5th edition. I’ll likely be underwhelmed.

Psion/Psychic/Mind Mage

Part 1: The Mike Mearls Happy Fun Hour, 4/24/18

Part 2: The Mike Mearls Happy Fun Hour, 5/1/18

Co-creator of D&D 5th edition Mike Mearls shares his process of RPG design. In this episode, Mike dives into Psionics.

Psion/Psychic/Mind Mage (Wizard)

The following material was created by Dungeons & Dragons Franchise Creative Director Mike Mearls for his stream Happy Fun Hour, which you can watch live at Twitch.tv/DnD on Tuesdays at 4:00 EST or via replays on YouTube. This material is provided to facilitate community testing and feedback.

Mind Mage
This is a wizard who captures the feel of psionics.

ESP
Tower of Iron Will
Telekinesis
Mind reading
Telepathy
Force push
Suggestion
Thought projection
Body manipulation
Mind blast
Mind control
Psychokinesis
Teleportation
Memory Manipulation
Pyro/cryokinesis
Life drain
Light bending
Force fields
Stun
Phasing
Perception manipulation
Cantrips: Friends, Mage Hand, Message, Vicious Mockery

Psychic damage cantrip

ESP cantrip

1st: Cause Fear, Charm Person, Comprehend Languages, Dissonant Whispers, Thunderwave, Unseen Servant

2nd: Mind Spike, Phantasmal Force

Psychic Library
Starting at 2nd level, you can swap out a prepared spell for a different spell, once per short rest.

Subtle Magic
At 2nd level, you can cast spells in a way that makes them hard to detect.

ESP
At 2nd level, you gain telepathy and when you inflict psychic damage on a creature you can activate another effect as an action:

Read their mind
Track their location
View their recent past
Maybe you are invisible to them?
Mess with their senses
Need Psychic Cantrips
Mind blast – deal psychic damage
Force push – move target around
Sense minds – detect creatures with Int 5+ in range; not exact location – action, talk about material blocking
ESP
At 2nd level, you can:

Cast detect thoughts once per short rest
Does not require concentration
All embedded actions are now bonus actions
Probe deeper – other spells get better against target (vulnerable to psychic damage? Disadvantage on Wisdom saving throws?)
Telekinesis
At 6th level, you can:

Cast telekinesis once per short rest
Does require concentration
All embedded actions are now bonus actions
Duration 1 minute, target can’t change, ends with target succeeding on check or save
Limit what you can do to creatures
Improved ESP
At 10th level, your special use of detect thoughts can target more creatures or other upgrades

More targets
Better probe deeper benefit
Even deeper probe – take control?
Manipulate memory
Improved Telekinesis
At 14th level, your special use of telekinesis can target more creatures or other upgrade.

Duplicate spell more closely
More targets

Resources

Unearthed Arcana

Unearthed Arcana: The Mystic Class (2017)
http://media.wizards.com/2017/dnd/downloads/UAMystic3.pdf

Unearthed Arcana: Psionics & the Mystic, Take 2 (2016)
http://media.wizards.com/2016/downloads/Psionics_and_Mystic_V2.pdf

Unearthed Arcana: Psionics and the Mystic (2015)
https://dnd.wizards.com/sites/default/files/media/upload/articles/Psionics.pdf

Psion/Psychic/Mind Mage

Co-creator of D&D 5th edition Mike Mearls shares his process of RPG design. In this episode, Mike dives into Psionics.

Part 1: The Mike Mearls Happy Fun Hour, 4/24/18
https://www.youtube.com/watch?time_continue=2&v=gg6da9eDAOM

Part 2: The Mike Mearls Happy Fun Hour, 5/1/18
https://www.twitch.tv/videos/256928119

The Mike Mearls Happy Fun Hour, 10/2/18
https://www.twitch.tv/videos/317919069

Mike Mearls’ Happy Fun Hour Classes

The following is all from ThinkDM, an excellent site with lots of great resources and excellent references!

Classes

Click the class for the most recent version. Build videos are linked by date.

Subclasses

Additional Idea Sources

The Complete Psionics Handbook (5e)
http://www.dmsguild.com/product/222641/The-Complete-Psionics-Handbook-5e