there is no disconnect between horror survival and dungeon crawl.
the first horror survival game i played was dungeon master. it was a dungeon crawl puzzle game and terrifying with vanishing light, requiring food and water, monsters walking around making shuffling noises, sneaking up on you, trap doors dropping you into a mass of terror.
i was able to revisit some of that horror with recent alphas, when the floor gave way and i fell into a room of mass terror.
eventually, the horror aspect disappears. it happens in all games, once you get used to the mechanics. but the first time that mummy snuck up behind me and went "whaa!" is still a precious memory from dungeon master. and i have several more of those memories from 7d2d.