I am almost 100% sure that this file is double-decrypted, after EASF file there will be another encryption, pretty standard to other EA Sports titles. Tools that are left to us now can't help. CG File Explorer reads only decrypted files from FIFA 15 and 16. FIFA File Explorer by jenkey1002 for 100% contains decryption algorithm, because it can decrypt .ini files or .lua files decrypted this way, but it's not built with .net and it doesn't want to decrypt this one file I need. Always returns a ghost file containing 0 kbs of data.
If any good soul after almost a decade later could do this, I'll be very thankful

Afaik jenkey posted that he managed to break EASF algorithm in one hour of debugging.