I think A Good Day to Die Hard accomplished what The Expendables 2 (and 1, and the forthcoming 3) sought to do, but failed miserably. Light on the plot. Immediate, heavy action. And some character development to actually get the viewer to care about the fate of the actors on screen.
It's a testament to Bruce Willis' badassness that he single handedly made a better action flick than Sly, Statham, Jet Li, Dolph Lundgren, Chuch Norris, JCVD, Bruce Willis, Arnold, Crews, Couture, and Hemsworth did combined.
The latest Die Hard installment is certainly not flawless. Willis' lines are repetitive and cheesy. He says, "I'm on vacation" several times throughout the movie as he is in a car chase through Moscow, mowing people down with a SAW, or driving a large SUV out of a helicopter, but it does seem to work as long as your tolerance for the impossible is amped up, as it should be heading into any action flick.