The dlc is pretty interesting, it's more of a mechanical exploration rather than some more story content, although I'm quite happy with how it's been contextualised narratively, albeit a thin veil. It's nice that the game now has a equivalent of Mercs now. Although don't expect anything in the way of the assets, at least in terms of brand new areas or enemies.
I only got up to around the Workshop in Ethan Must Die, it's interesting to have Binding of Isacc style item drops in RE, although there's far fewer procedural elements in this mode than other Rogue Likes, enemy placement seems consistent and easy to memorise.