Interesting update to the seat trial...
I just flew CHC-NSN, and at Chch domestic this week there's a little room set up with a "Chooseaseat" sign outside. Inside, they have four different seat options set up - the status quo, the four seats which used to be on ZK-MCJ, and two other new options. If you try them all and fill out a survey you go in the draw to win 500 airbucks.
The lady manning the room was very friendly, we had a good chat about all the options. It turns out that the Q300 seats aren't certified for the ATR aircraft, which is why they aren't using the same seats, about which they get good feedback. The good news is that one option they have in there, which apparently is the most popular, I found to be a LOT more comfortable than either the existing seats or those grey ones they were trialling on ZK-MCJ ^