JPNZ:
As nice as it is to have a chairlift bike park, its not maintained at all well. Due to the volcanic dirt (I use that word carefully as its more like volcanic dust) its very hard to keep trails smooth and kept. The "greens" are almost blues and some of the single blacks approach double blacks. If you like steep tech descending then its great, there is only two blue flow trails out of 45 in the whole park. I look at places like Cardrona, Coronet, Rotorua, Queenstown Bike park etc as having much nicer flowy trails that are not just braking bump corner holes consistently.
Is that a use thing? As busy as Rotorua is, there are a lot of trails, same with Queenstown so I'd think the riding is spread out more so the trails hold up longer. I've never ridden at CAP but it's on the list. I used to take my bike up north for work to ride at Waitangi, but the trails don't appear to be maintained so it's very rutted and bumpy, even on a big bike it's not that much fun.