I don't know either. Tony, Darryl would be the man to call to answer your questions since he is the course manager. The drainage is a lot better than most courses but when the water table is high which is rare, It doesn't drain and yes that has a tidal aspect. The training tracks also need work. I don't think a mil can fix that anymore than 10mil can fix Awapuni or that either will make any difference to the success of CD racing. The trial cancellations imo have not been because the track was unsafe but that the club needed to preserve and maintain the surface especially given that the course proper is used by trainers for gallops which is why trials are generally run with cones to preserve the outside strip for that while the rest recovers.
As far as I am aware the FRC has taken up every offer of assistance from NZTR. That's why they have new plastic running rail, their own modern gates for trials and a refurbished stand and have accepted their position as a training and trial facility. What else do you think the club could have done?