please don't bring the 175 to the party its not a shining light of perfection and please don't mention up scaling it ( thats what got the 330 to the 225 and started this mess)
having done gearbox inspections on eurocopter and other manufacturers boxes what always surprised me was the apparent lower quality of the eurocopter machining and amount of tooling marks left behind. When they re engineered the pump shaft you could see a step change in quality.
look how long that shaft took to produce and certify...
There maybe some market for the 225 but if I was in the board room I would be looking at the next product and putting my efforts in to that rather than a band aid on a lame duck.
Imagine the cost of a new gearbox development and production for a legacy design with limited appeal in its primary market.