Would be great if we could replay finished levels from the hub!

If im not wrong you can select levels or episodes from the main menu.

Only when you've finished the game, right? What I'm talking about is being said in this review at 10:46:

https://www.youtube.com/watch?v=xcknq-wQn3E

I think the reason you can't do that is because you could abuse that to farm upgrades and become extremely overpowered in a very short time.

I still wish you could select the 2-3 level chunks to replay through the Workshop. It would feel more natural, the functionality seems almost there anyway, and as it is right now if you do grind up a bunch of upgrades you can't actually apply them to your weapons and then go replay an individual level and make it stick, you have to progress in the campaign for points spent on weapons and spells to save.

You just go back and finish the bosses over and over again.
After the sphinx I never really had any problems with unlock points ever again :P

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.