Thanks so much, that's super clear and useful feedback! Also good that you comment on the branching progression vs linear dungeon. I think in the perfect version of the game, we'd love to have branching progression, but wanted to try linear out first to see if we can get away with reducing the scope on that part.
We'll probably end up with a very simplified version: choosing between 2 or 3 doors with various encounter or utility rooms behind them. Maybe some effects that allow you to reroll doors, or increase the chance of certain rooms, akin to how Hades does it.