Given the relative simplicity of 5e it shouldn't be quite as difficult as Kingmaker or WotR Unfair difficulty, but if it's even close it will be a ton of fun.
I wonder if the improved tactics the enemies employ will resemble those from the start of early access. Game was a death trap for casters.
Casters are low hit point. My wizard died a few times when I was learning to play. I was playing on normal difficulty.
I played Solasta: Crown of the Magister. They are a very small company and did a great job with the D&D 5e rules. I had a blast playing it. So, I am looking forward to BBG3 with all the bells and whistles that Larian brings to the D&D game. It is going to be great.