FAF campaing used to change with every patch. i am head and sholders into faf community but i have no idea what patch is used right now There are also changes to campaing that are done without any patch. FAF campaing is also designed for coop FAF campaing is actually pretty buggy from my experience... at least it used to be, that is why they were making changes... Afaik new balance paches no longer affect coop campaing (mainly cause it usually breaks after patch is applyed)
Another thing... Supcom is very complex, sometimes it is hard to say what is a glich and what is not... attack move from factory is a glich (exploit) 100% sure for example, building unfinished buildings that have like 1-2 HP to stop enemy shells would be an exploit? i would enjoy seeing speedrun with exploits, especially considering how long it takes to speedrun... ofc i'd probably ban ones that would allow to insta-win a mission.
Getting people into a base version of FA is easy-ish... you create new ingame profile, you rename your mods folder, you launch steam version of the game that is already required for you to buy and have installed to play the game. Some people maybe use CD version of the game but right now they are a minority. Tho tbh older versions could be more interesting (for me at least) as you'd get more glitches :D