Let's hope so. I don't even mind them but GVF being given more time to headline is the worst possible outcome, no way they can pad that show out with their current catalogue. They're already being given 15 minutes less than 2019.
Frankly as a weekend ticket holder I'll be a bit pissed off if we don't get something back from Metallica not playing. That's an enormous blow to the ticket value on top of FNM, QOTSA and Fender already having not really been given appropriate replacements. Even if it's just some free bar tokens it's better than nothing. As you say, no way they can find a decent replacement in time.