Datsyuk basically does two moves now:
1) his usual backhand forehand
2) backhand (see the two goals he scored against the Leafs around the New Year)
He'll shoot once in a rare while as well, but goalies are going to take their chances that one of those two dekes are coming.
It's actually a good concept because the two moves counter each other. The problem is that he hasn't been executing as well as he'd like (whether that's missing the net or not getting them up high enough), plus the goalies basically have a 50% chance of guessing how to play it.
When the shootout was fresh, goalies were clueless and terrified of Datsyuk because they had no idea what he might do. That's why you'd see them go fishing on his backhand/forehand deke. They now know his bread and butter. He should try better to adapt, but it's easier said than done. It's like telling a pitcher with a full count not to throw one of his best two pitches.
The actual "The Datsyuk" move simply can't be used often by him. There's a reason why we've only seen him attempt it 5 times in his career in the NHL. Twice it's been saved, including the last time he attempted it in a shootout (Mike Smith). He'd basically have to use the counter to that move (which is actually shooting blocker side) far more often for that move to continue to fool goalies (trust me, I've found out for myself as a skater.) But even then, goalies would quickly adapt and start guessing. Goalies have the advantage in the shootouts as is. And the more a shooter goes, i have to imagine that those odds probably only get stronger.
If there's one idea I think Datsyuk could incorporate more often it's going Patrick Kane style. Go in very slow while stickhandling in tight and attempt to let the goalie make the first move and then trust your instincts. He has the hands and quickness that should allow him to have some early success with it.