Well, let me see if I can get your take on what I am trying to build in my system of "magic." I always had some fascination with the idea of psionics in the old AD&D system. There was a Dragon magazine article on the subject way back when, I think. Wish I still had it as a reference, but lost it long ago. So I am trying to base a system of magic based on the use of the mind to alter probabilities.
And the purpose of creating a believable system of magic is to create friction or a hierarchy in society. Those with the most ability are a select few with both telepathic and kinetic abilities; they also hold the greatest risk of losing grip with reality when they manipulate probability. Beneath that are those with kinetic ability (run faster, jump higher, limited control over energy). And then there are the normal humans that hold a lot of fear, jealousy, loathing, etc. Throw in the additional friction of those with power versus those who have none, economics, and religion and stir vigorously.
I thought it would be fun to start with a very ordered society and then watch it all come tumbling down. The "new order" is saved for the sequel, I think.
Now it is just a matter of trying to figure out the limits of power and what happens when one goes too far. I have kept it simple, with those practitioners who push themselves making themselves ill both physically and mentally. Megalomania takes a prominent role with the antagonist. But it is difficult to know the difference between straining credibility and creating a situation where the reader sits back and says, "hey, that was cool!"