Nah, I think if De Gea still has one weakness, it's being hesitant in coming off his line. I don't think the instance you speak of was 'good decision', it's just basically what he always does, stands back round his goal.De Gea's agility is out of this world. He has great footwork and he's always ready. Schmeichel seems to be better on the 1v1 and leadership but De Gea is better at everything else.
There was an instance in the first half yesterday where Sanchez was bearing down on goal with Smalling and a cluster of players all vying for the loose ball. De Gea looked like he was going to come out for the ball but suddenly stopped and just stood his ground. In the end Smalling managed to get the ball out. It was a great decision made in a split second under tremendous pressure. If De Gea had come he would have clattered into Sanchez and possibly conceded a penalty.
In all it's De Gea for me.
Schmeichel was miles better at handling those situations, though being a brave 'keeper means you get embarrassed on occasions, a la God chipping over him for that goal.