Vettori's place in the side will never really be under too much pressure IMO, he is NZ's best spinner at the moment and can bat quite well and has already proved an effective captain. True, he is not bowling as well as he can and I'm not too sure why that is. He really needs to develop some more tricks or work on bowling with more variety and spin because at the moment the opposition batsman play him with little difficulty. I'm unsure about the spinning depth in NZ at the moment though, obviously there is Jeetan Patel but who would be next in line? Nathan McCullum? Look at his bowling average, its pretty poor.