Regarding the difficulty, the current trend is to solo honour mode. It's not difficult at all if you're playing a party of four, as intended.
I've watched streamers who are terrible at the game walk through honour mode. Sure, they use more resources than someone who is good at the game, but resources are nearly endless. This is a fine design for a regular mode, but not the most difficult.
A big part of the problem is that the game is designed for the player to win. The AI should ultimately learn from players on higher difficulties and use that learning to win against the player. Create a real challenge.
