The Kiwis have been using some strategies far too long, even when proven useless. The bowlers know zilch about line and length (and many would agree on that), but have got away with bowling rubbish on minefields called cricket pitches, where the ball does a lot. For a very long time. Besides, they're all medium-pace, and they would struggle in less favourable conditions. Moreover, some bowling performances that would not be called match-winning by any means are still considered 'good'!
Their batting has never developed since they've played on such pitches for far too long. Their biggest worry has to be opening the batting- they've picked and dropped several promising openers and have repeatedly opened with misfits from the middle-order, wo have neither the technique nor the big-hitting ability.
Injuries to key players in larger numbers so frequently raises doubts about not only what the team's physio and fitness trainer do, but also about the attitude of the players towards fitness. How often do you see so many Australian lynchpins injured at the same time? At the same time, some selections are just plain ridiculous- a medium-pacer with a dodgy action and no-ball-six-balls, a streaky middle-order bat opening, a keeper-stand-up medium-pacer who can bat a bit and no more- how can a team win with so much dry weight?