I played a little with it when it was released and found it enjoyable enough, but it needed some polish and there were bugs. I prefer to wait until it's in a better state.
Progression is sometimes difficult but that's a feature, you have to explore, find the passwords, understand how the world works. Write everything down on paper or using the in-game basic notepad.
The combat is very uneven, as is the character build. I didn't have enough social skill points so I couldn't get followers to help in the combats, and I wasn't proficient enough to fight more difficult enemies because my build was not good. The stealth approach doesn't always work indeed, you can't rely only on that, only partially.
So I think the biggest issue besides bugs & polish was, or still is, balance. And they should drop the clumsy automatic pause in the combat system and make it a normal pause. It doesn't bring anything original, it's just annoying.
The other thing I wasn't fond of was the unreadable map and undistinguishable items because of the pixel art, but there's nothing for it, so you've got to like that style and know that your eyes will probably lose a little acuity after playing Mechajammer