From what I've seen or observed of Shaw, he seems to be heavily reliant on boundaries. While that's good in ODIs and T20s, I somehow feel he overdoes it in Tests. Of course, it's still his early days and perhaps he will tone down but Shaw, to me, doesn't look like a stable option for now as an opener in Tests. Too flashy to my liking.
I would rather prefer having someone who would wear the new ball down. Doesn't necessarily mean the batsman should be 10 off 60 balls - but someone who wouldn't mind scoring in singles/twos which I think Shaw doesn't do (at least early on in his innings).
I hope I'm wrong. Nothing against the fella but I feel his aggressiveness will often result in a wicket especially in conditions where swing is plenty of offer. I do, however, think he will find a place in the playing XI and I'm afraid that we will often see our no.3 out in the middle within the first 5 overs.
As for the series, I think we will see no draws. Advantage NZ 60-40. It's either gonna be 2-0 or 1-1.