I've added a citation for the performance issues.
Those fixes added by someone are placebos:
1 - The CPU affinity fix: The game process already sets itself to every core available as it should, it just doesn't use more than 2 cores in reality due to engine limitations.
2 - The .ini fix: Those changes either do nothing or make the game more unstable.
I've added a disclaimer to the co-op 30 fps unlocker - "This fix lacks instructions and needs testing."
EDIT: Cleaned up some wording and formatting as well, and removed those generic/placebo fixes from the Issues fixed section.