I just bought it on GOG and I leaky like the exploration that PB keeps rocking since Gothic 1. I don't know however, why they won't return to Risen 1's combat system as I find it way faster, responsive and a bit more skillful. Even Risen 2 and 3's weren't that sluggish. But of course all of them look kind of ridiculous witht the dodge roll compared to Risen 1.
I don't mind the difficulty, however. PB's games (before the awful Risen 3 balancing) was always about testing your (character) limits. There were areas you weren't supposed to visit. This is still an RPG and not an action adventure. And even if you were strong enough to beat one enemy easily, fighting two or even three at the time could completely turn the tides against you.
My buddy and I are playing PB's games since their very first release of Gothic 1 and we are still excited about their games. All of them have this special "PB charm" you won't find in RPGs made by a team with the size of PB.