RED update thoughts and feedback

For Zero, does the "Change Potential" button essentially work the same as Cubes, where there's a chance it can upgrade from Rare tier to Epic -> Unique -> Legendary? If so, are the chances about the same as the cash shop cubes, or more like the free cubes you can find?

I didn't go epic until i was 16x doing resets as many times as i could, and i went unique less than 3 resets after epic. No way to know but does it even matter? It's free so just keep at it.