Four Nations was a perfect example of how sh*thouse Parramatta Stadium is.
Bluetongue, a similar configuration to Parramatta (minus the fences between each section and one end of the terraces), if it starts pissing down and there's only 10k-odd there, you can move up undercover if there's seats. You're not physically stopped by huge metal spikes.
We had to sit in the Terraces in our assigned seats at Parramatta that day and get soaked while there was at least 1000 undercover seats unused and inaccessible to anyone not in that section (who were all already dry).
It's in THAT situation where Parramatta Stadium is an utter embarrassment of an RL venue. As I said vantage points and whatnot is great, good rectangular stadium. Just totally stupid planning.