All up, lots of work to do to get things functioning ideally again, the resolution of Abby's issue being just one of the pieces of the jigsaw - there are many more. But one of the pieces which is in place and working (at least from a coaching and player development perspective at present) is the centralised training programme.
Is it working though?
When you look at the stats it's not great.
In the last 3 years the Football Ferns have played 45 games and won 11 (well 10, 1 win was the default when PNG didn't turn up), drawn 13 and lost 21.
They have only managed to beat 2 teams ranked higher than them (Brazil 8th & Denmark 15th) and their FIFA ranking has dropped from 16th to 19th
If you are using player development as a measure then it probably is working as several players have managed to land professional contracts which they probably wouldn't have without the program.
The problem with the current set up is that there is no real competition at a local level for the Ferns players, and that shows when they play internationals, of their 21 losses 11 have been by only 1 goal - if they had the regular competition they would more likely be getting results in these games.
I don't necessarily agree with your statement that we are too small of a footballing nation to have our resources scattered around and about (although where are all the female coaches?). Scotland is a similar side (pop only 1 million more than NZ) and they are a good example to look at as in 2013 NZ beat them 1-0 (although I believe it was quite easily and should have been more), now Scotland beat NZ and then beat Austria and they are a team on the up. The main differences here are that the Scottish Government help fund the team (before they play in major tournaments). And more importantly Scotland have a proper National League (with 2 rounds ie one more that FIFA funding pays for)
There is no real reason why NZF can't do the same, start small a 6 team National League with 3 clubs from the Northern League, 2 from Capital-Central and Canterbury United. Get the teams that miss out to play in a 2nd division with Southern United
Whatever the answer it needs something because I'm sick and tired of hearing excuses from Tony Readings about how we are almost there!
Your national team is only as good as its domestic league, Major flop.