No, never! Paragon is a bad system. After is the principal source of power crip on D3. Power need come from a mix of items and skills.

Paragon system... NO NO NO, you want Wolcen to be full of botters as D3? Or you want to have insane power creep? Paragon is old and lazy infinite system pattern.

You need an Endgame system that Progresses to no Limits... Otherwise you have sometimes reached an end that results in players dropping playing the game.
Paragon or how you would name a System like this is necessary.
make it small or pointless it only need to feel good, playing after near Top-Gear levels feels reasonable.