I might come back to it but relocating the Guineas has nothing to do with the thread topic. Nomate's original post was about the potential downgrade of a number of pattern races as well as a reduction of their number and Goodson's comments on that. Their were some very good pertinent posts on that in this thread initially but it seems to have gone completely off track.
As far as the Riccarton track is concerned, it is what it is and I think I read that a full renovation is in the wings. Riccarton currently is a very good training centre especially with the introduction of the AWT. I realise there are some anomalies due to track availability etc. I don't think it would be viable to build a custom training centre elsewhere from scratch. In the same way, there was no point jumping up and down at the time the current track was laid once the issues emerged (no money or time to relay it) but it has been lived with long enough.
I generally agree with Pitty that it is advantageous to owners with horses trained there to be able to race there for the most part with today's transport costs among other things. Now maybe we can get back to the topic.