Following on from Ray's comments, it would be a real pity if Pukekohe is altered to a configuration that only really suits the Australian V8s that race on the track two or three days a year.
What about all the locals who run on it for the other 51 weekends who don't want a chicane on the back straight and don't want street circuit concrete barriers (from Hamilton) around the track.
In fact, if there were concrete barriers and catch fencing placed around the track (in lieu of run-off areas) then the track could actually be too unsafe for most historic and classic racers who don't have the levels of inherent car safety features such as comprehensive roll cages that are found in the Australian V8s.