Ah, cool, I actually like that as a concept, that way one band foesn't have to feel like the 2nd fiddle.
I was one of those early leaving people haha, I went specifically for Gojira and frankly have never been huge into Mastodon, so when they closed I used it as an opportunity to get ahead of traffic. The pit for Gojira may have also factored in, I could barely move the next day.