He would at least make the movie more intelligent. It had a potential of being someting like a mix of Alien and Doom. Instead it was a typical dumb film for high school kids.
The Thing or Alien made you care about the crew. They were just a working crew, with some scientists, doing their job and unfortunately discovering alien life form. Even Aliens had a logical plot, it's a rescue team, armed with weapons, going on a rescue mission and hiring Ripley to help them out, since she encountered one of those aliens. And then of course evil corporate man being behind the mission.
Meanwhile Horizon already starts off dumb as hell with the crew not knowing shyt about space, constantly asking questions where they going and not getting clear answers. Why would you hire such a crew to find a missing spaceship? Already a red flag there and you know everyone in this film is just a dumb sacrificial lamb. Gotta give the audience more than just gore images with dumb plot, even though gore was well done, and I heard they actually had to tone it down... I can't imagine what the fukk was made there originally. But this is probably why the movie had a fanbase.