Glad to see it's getting positive reviews. I had Beta access, but I only played up to the third area because I want the finished product before I do a full playthrough. I got my backer key for the full Steam release a few days ago.
Regarding the combat, it definitely wasn't great in the Beta. I'm hoping it's better in the final release, but I don't see it being on par with most modern first-person shooters. That said, combat isn't really the focus here so we shouldn't be comparing it to Doom, etc.
The other thing that needed improving in the Beta was the AI. Enemies often didn't react to sound when they were close enough that they should have been reacting. I really hope they've fixed that because it made things too easy when I could just take out enemies one at a time because of that.