Most of the 9 ATR72-600's ordered replace Q300's which replace 1900D's.
The 11 ATR72-500's remain but get a cabin upgrade. The 23 Q300's remain. The 18 1900D's reduce to 12 over the next year. ZK-EAL and ZK-EAA have already left and there will be further reductions. Air NZ has said GIS-WLG is expected to be Q300 in about 18 months, but with reduced frequency.