This firmware update will add uncompressed raws and better focusing with adapted lenses, in particular A lenses.
Sony to Bring Uncompressed Raw to a7 II via Firmware Update; Follow B&H Photo Explora Blog for Updates
Edit : that page is no longer available. But you can read the gist of it here :
Sony will add uncompressed RAW on the A7II via firmware updated coming on November 18! | sonyalpharumors