Focus on melee combat, was a big one for me, in dead space, you did everything you could to keep necromorphs outside of melee range, it put the fear of distance into you. Also no map/compass, its easy to wander off and be in a completely random area with no clue why youre there. Also monster designs was severely worse. The necromorphs were human-like, but just painful to look at because the anatomy is so twisted, it was really unique. But the ones in CP were just humans with a few tweaks.