Funny really, I have had the same thoughts about Dale Steyn recently. Just at the end of his action he appears to give a very big "flick" involving his lower arm, not just his wrist. Didn't notice it when he first started. Are players being coached this way now they can extend up to 15 degrees?
Now Senanayake, that's a whole different story.
How has he not been pulled in by now. He looks a candidate for testing? When and how do they actually look at players?