Problem with God challenges, unable to change settings? (difficulty, ecc).

If i activate a god challenge, i cannot change difficulty or level scaling before starting a new game, was it intended?

Yes, that is how it works for now. You can't use Berath's Blessings either.

 

Edit: we have been discussing it and suggesting to remove the restriction. You could follow this thread.

Edited October 24, 2018 by InsaneCommander

As of 3.1 beta, you should be able to change difficulty. However, Blessings and mods are still out.