Bloody hell did he pull out of a show as well, that looks even worse. To be honest Maneskin is bigger than him in Europe and just better.
Maneskin have had a 7, 3 and 1 peaking albums in Belgium. Sam in two different categories has had, 14 and 69 and 16 and 87. It's a stronger booking than Lenny Kravitz but I think that was quite clearly the weakest one
He should probably take the Legend slot as he's outright championed it, he's not going to get the headliner birth even though I think he'd pull it off. I don't think it would be a strong move for Glastonbury.
Nails are playing the same arena for Damnation this weekend and are third from the top of the main stage there (and their main stage uses the Outbreak second stage) so would be very surprised if they headlined...