He's contributed much more than I thought he would at the start of the season. We've had a few South American talents come to Arsenal only to be sent out on loan for most of their career with nothing to show for it.
Only downside to this is Nketiah. Whilst he's doing well on loan at Leeds I worry that when he returns he'll be 4th choice striker and end up leaving. Arsenal really need to manage the situation carefully given Aubameyang, Lacazette, Nketiah, Martinelli, Nelson, Saka, Pepe, Smith-Rowe are all vying for just 3 spots.