They give the award to the guy who wins the big competitions. Otherwise if it was just technique, Messi would have won it 8 years in a row.
Ronaldo has played 46 games and has failed to score in 21 of them. Suarez played 50 failed to score in 17. He's scored a lot more winning goals than Ronaldo too.
But because Barca are out of the CL, he won't win it. If Real win it and Ronaldo fails to score in any of the last few games, he'll still be awarded it.