First Real Life, Now Internet Too? 2020 is truly a year of disaster.

rip my rgl games

The released leak is from 2017, so post-Jungle Inferno.
Not too much will likely be different from the actual version on Steam, just bugfixes and stuff. All of this is more of a precaution than an actual threat, as being able to actually see how the game's internals works means you can spot bugs that could allow for exploitation that otherwise could never have been found. Expect a rise in cheats, but wait back for word from Valve for anything else.

Don't really think any patch would help with the spread of the source code, at least for tf2.

It's a relatively old code, so if it still risking tf2, then it will do so for a long time.

we are all going to fucking die