Maybe, update more often

And when u do, add a map which is a scp site that was taken over
(would be epic)

Or you could add the Lake Baikal in Russia map

yes i copy pasted Lake Baikal in Russia

maybe add mtf units like mole rat and village idiots

fleshy mass (like the monster in CARRION but with smooth AI and softbody movement) / flesh amalgamation (very large flesh masses made of multiple infected organisms fusing together
[can be very loose concept] ) / amalgamation mechanic where it would mix two infected organisms with ai and make a fleshy abomination. (sounds like alot of work though but i'll be surprised if you can pull it off)

second ideas i have:
maybe if there is an evolution/adapting mechanic, that makes them stronger over time if they endured certain situations and wounds.

maybe a cancerous host or alpha mechanic, with a stationary large infected that would grow over time and produce smaller "drones" of flesh monsters, to bring back meat and resources for the alpha, making a loop maybe. this would be interesting if you could also play as the alpha or have other humans with ai to fight the alpha. (interesting, but probably difficult concept of mine)

add tentackles

Maybe stages of infection skins? like theres a non infected one, slightly infected one, semi infected one, and an infected one.

add a map covered in blood

make an uptade that when you use flip mod on scp 610 with flesh accesories or multiple limbs then it will not seperate or break it will just be same like you didn't use the flip mod before and the scp's 610 have so much strenght that when i move them then they start to shake and fly out and bouce off so make them less stronger and fix so more bugs if somebody else tells you. idk.

I would recommend a infection system. It would bring a whole new level of awesomeness to this mod!

infection system is what we all want!

If the person who made this mod is able to code, I wouldn't be surprised if coding a infection mechanic would be too hard but what if it just starts bleeds like that worm staff or the skin dissolves (I dont remember what does it in the game but as in people just take damage in a certain way)

Add super duper creepy flesh man