Looking at the plan I would say the West Stand is still the 'main stand'.
There seems to be a rather large gap between the pitch and the West Stand for some reason.
Also the residential tower blocks seem very narrow and will look a bit odd if they are 13 stories high, it would be nice to see some side on ground level views both inside and outside of the stadium. I thought that was what we were going to be shown at midday? Hopefully more detailed plans will be available to view on the 23/24 Oct.
Also
West Stand is certainly the main stand, it has a big forecourt. There isnt a gap between the stand and the pitch though. The light grey part is surely part of the roof.