Similar was said about Bissoma, Mac Allister, Webster and others, players take time to adjust and it may be a few weeks or months before we see the full potential playing for us.
Barca have given instructions, pending his £1B transfer, for him not to play in case he picks up an injury from the nasty Africans who will target him because the ref's are all blind. FIFA also want to avoid all the racist chants from the crowd that will happen every second he is on the pitch.