I already edit a couple wikis and have long since forbidden myself from taking on any more (It really is a massive time sink). But here's a few things I noticed while using the Doom RL wiki.
Vampire:
Effect You gain three hp (6% without Ironman) per enemy you kill, up to 200%.
This is no longer true. The amount of heal gained depends on the enemy you kill. A Cyberdemon heals a hell of a lot more then a former human, though I am uncertain of the exact numbers.
Cerberus armor:
Resistances Original; 70% fire, 50% plasma, 70% acid
This made me assume that if I modded red armor it would result in 95% fire resistance. I'm not sure if it would keep bullet/melee/shrapnel resistances of the original armor, or if the last patch changed the way cerberus armor works. But at the very least a note should be added to the comments section so others don't made the same mistake I did.