The main story, while interesting for me as a big SCP fan, was too subtle or hidden behind a wall of text for my friends, who are not big SCP fans. There is an improvement from the previous update with the addition of TOC; however, adding voiceovers to the UIU character that the player controls would be a huge addition. I'd say the best approach to implementing UIU voiceovers would be something similar to how Ready or Not handled player voices. There doesn't need to be a lot of them—maybe 4 or 5-and adding some random background chatter or reloading/action voice lines would go a long way. Features like that would bring more life to the story and action.
Additionally, some minor cutscenes would significantly improve the storytelling. They could be rare and only appear in a few key segments of the game, but they would still make a massive difference for me.
Another thing that should be added is discouraging rushing. When my friends and I were playing, one friend decided to just rush ahead and ignore the enemies, and nothing happened to him. The horde didn't care and focused on us instead. This ties into my next point, which is the enemy human AI. I think, given how the health system works, they should either deal less damage (getting one-shot is not fun) or the player should have more HP. This would work perfectly with another issue: there are no real consequences for dying in the game.
I think making respawns more rare—only occurring after clearing an area of enemies or moving onto the next area—while giving the player more HP so they don't die in two shots, would be the perfect way to balance things out. It would make the game both less forgiving and less frustrating. A feature I'd like to see alongside this is the ability to pick up meds for later use—maybe one or two—so this system could work more effectively.
That being said those are just some nitpicks, and the game is amazing. Good job to the team, i cant wait to see what the future holds for this game!