Mcg has just as big of a hga as our grounds if you meet an interstate team - saying there is NO hga is deceptive.
Mate, I goto the MCG a lot. Compared to going to grounds with home ground advantage there is no experience of any distinct advantage. Even as far back as when I first started going to footy when most clubs had their own ground and only Demons and Tigers played at MCG. If you played a game at MCG or Waverley Park you could tell it was as close to neutral as you could find but goto Moorabin, Geelong, our own ground at Princes Park, Western Oval, Windy Hill, Perth, Adealide etc etc, the massive home ground advantage were clear. Now we removed most of those home ground advantages it comes back to far less with Geelong, Perth based clubs and Adelaide based with the big advantages that other clubs used to enjoy. Those clubs with distinct home ground advantage are the loudest about the talk of it WHEN they do not enjoy the protection of having it.