Not sure what changed yet.
Doesn't look like anything major, mostly origin files and the exe update so likely something to do with the client.
Another website mentions pak1.pak being updated but the timestamp is untouched and the same copy exists on the older version.
The crack I had to use before would always get flagged by defender whereas the new one doesn't and only needs the executable.
Rumor is this latest version removes some SecuROM traces.