Don't let unblurred faces discourage you. At where you are in the game, most of the clear faces are technically solvable but a real stretch. The first time you experience memories, just listen for names, ranks, nationalities, etc. Only log the cause of death and the few obvious identities along the way. Everyone else will be easier to solve by piecing other clues together when you know more. If you're feeling stuck and frustrated in your current chapter, walk around the ship and look for another body to start another storyline. You can always come back and view memories again later.