OK, De Gea played a blinder, but he didn't press and make Arsenal's backline look like they were playing their first game in pre-season, he didn't throw Koscielny around like a little rag doll before assisting Lingard, he didn't torture Arsenal's defence with silky interplay & movement, he didn't make Ramsey & Xhaka look like 14 year olds playing against an 18 year old(s), and most importantly, he didn't score the 3 goals away to the Emirates.
Yes De Gea played his bit, but we have to remember Goalkeepers ARE part of the team. He is actually paid to save. It's like saying "Pfft Messi won another 3 points for Barca" - well, he is the best in the world, of course he's going to have a big say in Barca's victories quite regularly, just like De Gea, the best in the world in his position, is going to have in ours. Our victories shouldn't be belittled just because a world class player in our team has a great individual performance, that's what he's there for, that's what we stuck by him through the rocky early year(s) for.
Feeling very proud about how De Gea has developed, and wouldn't swap him for any man between the posts.