Jared Rascher
Explorer
I took a look at how the 5e Mystic developed across several Unearthed Arcanas, and then took a look at the preview version of Web DM's Psion class, which will be making its debut in the Weird Wastelands book. We don't have any subclasses yet, but I take a look at the structure and what we know so far about the class on my blog.
What Do I Know About First Impressions? Web DM's Weird Wastelands Psion Preview
What Do I Know About First Impressions? Web DM's Weird Wastelands Psion Preview