The show has been significantly neutered now where there is no actual stunts. A video from 2013 of the old HSD had a motorbike doing wheelies, a police car getting split in half, the cars tilting on one side, an explosion setting off a fire in the middle of the track, and a car jumping into a building, setting off an explosion.
Meanwhile, a new video from 2023 of HSD2 shows most of the stunts removed, and replaced by a few cars just drifting around the track for the whole show. No explosions, no fires, just drifting around the whole time.
What about a new show themed to Mad Max? It is Aussie, owned by Village, and it appeals to the same crowd as HSD. Keep the stunt aspect of the show, but change it around to fit the Mad Max IP. Its also not like its a dead IP, as Furiosa is coming out in May and there's a new sequel as well on the way.
Unfortunately I think we are likely to see HSD2 for a few more years but once its time does come I thought that would be a good replacement.