Good to see a New Zealand spinner who knows how to turn a ball. I don't reckon Vettori's turned a ball in 6-7 years.
Trent Boult I think is too impatient at this stage of his career. He tries too many 'dream' balls, the ones where if you get the perfect swing its unplayable. He drifts far too often into half volleys and onto leg stump. He needs to become more consistent. He's got all the tools, decent pace, swing, seam, but he's not consistent enough.