It is a valid point Mardi, as the only difference between what you are talking about and Strathayr, is the top turf/mesh elements layer, Ellerslie now has a track with a superb drainage system, just something not quite right with that top layer. Something that Barry, who has been associated with the installation, firmly believes will come right, as it was raced on too soon.
I presume there was a lot of discussion on the type of grass to be used in Auckland based on climate. NZ has much expertise in breeding and growing perennial rye grass, for sports use
I guess they went with Strathayr because it had an established name in sports and racetrack surfaces. You have seen the ferocity with which the industry turns on itself, from all the amateur DIYers who know very little, when it tries to do something and gets it wrong, especially when it is seen to be re- inventing the wheel.
Your stance is supported by a track like Randwick who had 230mm the other week, yet still raced fine on a soft surface the same day. As I said they probably should have all got themselves over there and found out how they do it