De Gea is statistically one of the worst penalty savers you'll find across Eurpoe. His record is so woeful, it's insane for a top keeper.
Henderson should have surely been brought on, doesn't matter if De Gea played the full game. Penalties is a complete mental game. Even just sending on Henderson sends a message of "this guy is a PK specialist" and puts the added pressure on the Villareal players.
De Gea just wilted as the shootout went on, and I knew he'd miss his own kick. Let's face it, Rulli was pretty terrible for Villareal too. Should have saved Bruno's and Shaw's pens. But unfortunately, we had a GK with one of the worst save stats you'll find between the posts, with Henderson sitting on the bench.
Bizzare.