There have been a couple of articles about air services in Rotorua's Daily Post. On the domestic front...
Rotorua Airport manager George White is working on a business plan that may include lobbying Air New Zealand to establish direct flights between Rotorua and Queenstown. Rotorua International Airport may lobby Air New Zealand for direct flights between Rotorua and Queenstown. The airline won't be drawn on whether such a service would be viable but tourism leaders say it could be a short-term fix to counter tourist cancellations resulting from the disasters in Christchurch and Japan.
The full article can be found at : http://www.rotoruadailypost.co.nz/have-your-say/news/airport-eyes-rotorua-queenstown-direct-flights/3946035/
Perhaps they could use a HS748?
Meanwhile on the international front
The number of transtasman passengers flying in and out of Rotorua International Airport is expected to nearly triple in just over three years. In the first year, 21,273 passengers used the service between Rotorua and Sydney.
The full article can be found at : http://www.rotoruadailypost.co.nz/local/news/rotorua-transtasman-passengers-expected-to-triple/3945800/
I wonder if the loadings out of Rotorua are better than what Air NZ got out of Hamilton