I am going to be a naysayer this year, again. The elite women are only racing 131km?? That should be the fun ride distance.
The elite men only 180km?? Again, that is the long course??
Looks like bike paths as well. I do hope one day the UCI will come to the US (though I'm sure there are many people who wouldn't travel here now), and do a US style gravel race for the WC's.
I still feel that there's a disconnect between US-style "pure" gravel and the UCI's vision of these championships. As I said a couple of years ago, I think the gravel purists want something akin to the 24hrs of Le Mans, and the UCI want something akin to the 24hrs of Daytona, where the big names from other formulae come in to join the specialists and add star power and make it into a bit of a festival. The audience will already know who the road, cross and MTB moonlighters are and the number of gravel specialists they need to familiarise the audience with will be minimal. With a number of veterans and also-rans of other formats filling out gravel startlists, it's a lot like the SkiClassics and the UCI's version of gravel will only perpetuate the image of it to a large percentage of the fanbase as a career graveyard.
However, as you say, doing a more authentic course will probably dissuade a lot of the moonlighters from participating, and circuits to give a fan experience have long been a championship standard in cycling. The best bet would probably have been next year in all honesty - with 'crossers going to the US in early September for Thunder Cross, and the Road Worlds being in Canada, it would be easy to encourage riders to stay for the Gravel Worlds if they were in North America. Unfortunately, they're in Australia, which means there's a good chance they can be more "authentic" than racing through the more densely populated European terrain, but with the flip side that it's a huge distance to travel for, well, more or less everybody outside of the local scene, and a long, long way away from either the road or the mountain bike Worlds. Perhaps that will be a good thing as it will enable some of the gravel specialists to have more of a chance to make an impression on the audience - the drawback is that the broadcast time is going to be very inconvenient and that very few gravel races get broadcast to capitalise on that momentum, meaning come 2027 when the championships are back in Europe, we likely get a return to the current format.
I don't think the men's race distance is an issue, though having a shorter race for the women is silly.
Plenty of major US pro gravel races are 200km or shorter. Of the LifeTime Grand Prix events, only Unbound is longer than 160km. USA gravel nationals was also 160. Mid South is 160. There are a handful of 150 mile (241 km) races, but those aren't the norm.
At the same time, it depends the prism you view it from. The World Championships should be more of an accomplishment than an interchangeable race, being a decent % longer than a "normal" event is an easy quantifier of that. Just like how there are very few (some, but few) road races of the same kind of length as the Monuments, and the World Championship and Olympic Games road races tend to ape the same kind of length as those races too. A shorter race is fine if it is sufficiently challenging, the impression given of this course does not suggest that is the case however.