I will try and do a longer example when I get some time. I hope you understand
Not a 4 sider. You use a 1D100 or 2D10 on a few tables that give you suggestions and ideas to further your story. You also use those dice on the Fate Chart (a large table with probabilities of yes, no, exceptional yes, and exceptional no answers to your questions). On one side is the odds of your questions be yes (odds like Impossible, No way, 50/50, Very Likely, to Has to Be) and the Chaos Rank from 1-9 on the bottom. You cross reference the Odds and the Chaos Rank and get a number. Roll your dice under this number and you question's answer is "yes", above this is "no" then there is two smaller numbers that if you roll withing the ranges it becomes exceptional yes or exceptional no.
Oh yes, you can create a whole adventure, IF YOU WANT, before you get to your group. You could even make a character and play through that adventure to test it out. You can even create the adventure before hand then during play something may change and then you could use Mythic:GME to help you create new stuff on the fly.
The weakness: You have to resist cheating and wording your questions to your own advantage. Combat could get a little messy but I gave you what others have tried. The art was the same as Mythic which I think could have had new art. Oh, one thing that is my weakness is that I write all of my adventure down (from the questions I ask, to the scenes I expect to happen then they get changed because they were modified, even the playing out the scene. I like to be able to see what I did later.) Other than those I can not think of anything I ran across.
I hope that helps