Would be great if we could replay finished levels from the hub!
As the dev said this is a feature and you can return to previous levels to re-stock extra-lifes, ammo, health, mana, secrets and even perk points.
Once you finish the level it usually warps you to the hub and from there you can retake the latest stage you are in.
I think this is great since I don't need to wait for new game + to replay cool levels :)
I wish I could bump up the difficulty from the menu (for previously beaten levels)... but it's only part of my wishlist.