There were several West Ham players in the box and only Dominguez in a position to attack a cross. If Alvarez had any situational awareness he'd have recognized that he only had to cut off the cut back.
Morgan has looked absolutely superb on his return. There was one outrageous piece of skill a few minutes ago in which he dragged a pass back with his left instep to open up a channel and played it with his right in the same movement, all without breaking stride. I'm not quite sure how he did it and I don't think I've seen anyone do it before.
Keep this up for a few more weeks and I could see the owners spaffing some large ones in January regardless of PSR to try and get us into the champions league.