TrueCrypt used CRC32 to mix keyfiles into the KDF. I never saw an entry in VeraCrypt's changelog addressing this deficit.

I originally proposed BLAKE2 for this purpose on their issue tracker, circa 2014.

It would be a good improvement. I'll try to check the source to see how it's done

Does it mean that no matter the size of the key file, only the 32 bits of its CRC32 is being utilized?