It was about time, there is no way you can beat Davydenko playing passively.
I remember there was a short forehand that he had early in the third set that he could have easily hit and come in behind, but he just hit it back midcourt and engaged back into the rally for a couple more strokes before Davydenko predictably hit the winning shot. Sums up how the second set and the first half of the third set was like. I mean, he was just not moving forward into his shots at all.
The second set first started with some poor returning, dumping quite a few makeable ones into the net then it all went downhill.
At least he stepped up his game (finally!), although probably only by about a small amount, and that was enough to make the difference.