I think it is valid to believe, that if Gabbiadini had still been on the pitch when that cross flashed across their 6 yard box, he might have got a shot in, since his movement is simply at another level.
But I understand Puel subbing him. Lets not forget hes not used to English football yet and probabaly was flagging.
He's going to be unstoppable in a few week's time, or next season at the latest.