Whatever we might think about how “good” or exciting a particular pass like this is, opening up off track passes is an obvious minefield. Drivers would abuse it all day long, and if the rule is you don’t have to stay on the track to pass, how far does that go? If you’re behind a line of backmarkers, and there’s an alternative circuit configuration where you can take an empty tarmac shortcut around them, is that allowed? What if they’re not backmarkers? What if the shortcut lops off some laptime too? What if it’s officially “runoff area”? What use is a chicane, then?
Moreover, it’s difficult enough to get the variously incompetent stewards to stick to the very clear “the track is delineated by the white lines” rule and the “must not gain an advantage” rule. What hope is there when off-track passing is allowed “when the crowd cheers” or “at corners x y and z”? I for one have no faith at all in their ability to regulate.
And lastly, I bet that many supporters of this idea look at it as “reward the ballsy move” but are also adherents of the “these tarmac runoffs don’t punish driver mistakes” thinking, which is let’s say an amusing contradiction.