Maribou State would be quite random i think. Hardly going to get tickets out the door vs some of the other acts tipped to play. Can't see Bakar billed above Trippie Redd either
Also just a note but your DJ EZ slot is way off his actual size, he's one of the bigger Chevron names (sub / 3rd down)
We'll likely never know exactly how it breaks down, but I would expect any "blame" there goes at least equally onto the festival. The broadcast terms will have at minimum been signed off by the festival, and very likely written with full cooperation by them.
21 Pilot are 100% a bigger seller here than Charli. Possibly Tyler too
Not sure why Fontaines are subbing either - their Finsbury show has sold better than Charli's Lido day too!