Interesting I was curious about this one. So the dungeons are open to explore and reward exploration with valuable loot? Do they also feature good role playing and problem solving to bypass obstacles? How big is the game?
yep, there are very few dungeons that aren't open for exploration and they are much better designed than in skyrim, there are dozens of them too. loot placement is not perfect, but you won't notice that until late in the game. but yes, exploration is rewarding.
they changed the level up system from skyrim to experienced based with limited skill points and added some perks, it's nothing special, but not bad. there are some non combat skills, but the most important ones are for crafting.
problem solving - not so much. a few levers and switches here and there. you won't have to use any special abilities or magic in most cases.
pretty big. huge map and about 120 hours of content (or even more).