You have unlimited slots for copied, stolen, and created powers, or rather you no longer need slots for said powers. You can use as many as you want simultaneously, you are no longer restricted on how many you can store or use. This also extends to any charges or other resources that your powers builds up over time, you can now store an unlimited amount.
For powers such as Legion of Fae or (Trump) Power Seed that reduces your power to use them simultaneously, each power can now be used at 100%.
For powers such as Celestial Artificer or (Trump/Tinker) Artificer with enchantment caps, the caps are removed. You can place as many as you want/have charges for.