this mod reverts most of update 240.3 wich made the game a bigger mess than update 237 where epic games crossplay got introduced.
this mod doenst fix everything, you still need the following mods alongside this one:

damage fix (240.3 broke the tazer and shield damage, this fixes it) - https://modworkshop.net/mod/46062
fire DOT crit fix - https://modworkshop.net/mod/46284
flamethrower stun fix for crimespree - https://modworkshop.net/mod/46510
AI Reverted 240.3 - https://modworkshop.net/mod/47838?tab=downloads
Enemy Spawn Director 240.3 fix - https://modworkshop.net/mod/48583?tab=description
revert flamethrower (and other fire weapons) DOT fix - https://modworkshop.net/mod/50462?tab=images
Fix Community and Nebula account cosmetics being locked - https://modworkshop.net/mod/47476
Fix Blackscreen - https://modworkshop.net/mod/50665
Revert Drill Logic 240.2 - https://modworkshop.net/mod/50825
Revert Joker Changes - https://modworkshop.net/mod/53663
Akimbo Freeze Fix - https://modworkshop.net/mod/51255

edit: something important i forgot to mention, is that when using all mods i linked / provided, everything gets fixed appart from 1 thing: the cop AI.
in update 240.3, Starbreeze implemented a version of an AI changing mod that is somewhere on the website (i sadly forgot the name tho).
due to this, cops spawn in more frequent waves and want to rush / ambush you way more frequent, so keep that in mind.

so, until someone fixes that, you have a collection of mods to revert allmost all of u240.3

update: the same creator from the anti 240.3 update also made a mod to revert the AI, wich got reuploaded by CallMeSydney / Pansy.
now all of 240.3 is reverted, happy heisting

update 2: ok so i did some testing with the AI mod, and in stealth the AI is still broken (if i ecm when a guard tries to raise the alarm, he wont call again if i leave his line of sight).
in loud, the AI is fixed.

update 3: Nikita (aka Mister Creepy) has uploaded a mod that reverts the AI director back to how it was before the 240.3 update disaster

update 4: as of 12/09/2024 (12 september 2024) dragons breath rounds can trigger Overkill aced again. sadly they still wont crit. since the OVK Aced part is fixed, i removed the mod from this collection

update 5: i was notified of drills having issues with their auto repair logic and i didnt even know it was broken. luckely, Olafe made a mod to fix the drill logic wich is now linked in this collection

update 6: added 2 new mods.
the Flamethrower (and other fire weapons) DOT revert mod is a fork of the original mod, wich sadly had some issues and this mod fixes it. for the Cosmetic mod, it has been in the game for ages and it isnt caused by 240.3 per se

update 7: added a new mod: Fix Blackscreen.
everytime you join a heist, the mod will activate and get rid of the infamous blackscreen that previously required the host to restart

update 8: removed the 240.2 drill fix link, because the mod was taken down. i will try and reupload it when i have the time

update 9: reuploaded the "revert drill logic 240.2" mod and linked it to this post

update 10: added the link from Sydney / Pansy's joker revert mod, wich finally made jokers consistant / less broken again AND added a fix to the akimbo freezing bs, wich has been around for ages. thanks to Kevkild who showed the fix