The point I'm making though is the bolded doesn't just apply to WA teams when they travel - it also applies to their opponents when they travel to WA and thus all those aspects balance out, The only question is whether there is an accumulated dsadvantage from doing it more often. The best way to see that would be whether WA teams perform worse as the year goes on. No idea if they do or don't.
Geelong isn't extra travel - it's quicker if you fly into Avalon. I'm not sure about Tassie, but I doubt it is. Yes Gather Round is silly, but the lengthy trip to QLD is actually already catered for. My understanding (could be wrong) is that the WA teams do that less frequently than other clubs.
To me - they've just got to make sure that there are suitable breaks between games to allow for full recovery.
But yes, GAther Round has skewed the draw and home ground/travel advantages to SA teams.
Gather round should be built around the Showdown being the Friday night national broadcast match and a stand alone fixture.