True but also, it’s not just that.
I could think of many headliners that would excite me.
There are many interesting bands that are touring during June and July, that all weren’t booked (as far as we know). Sure, some have conflicting schedules now but still, it’s unfortunate:
Linkin Park, Deftones (Mad Cool), Pantera, Manson, A Perfect Circle, Gojira, The Offspring, not to mention System of a Down, who start their tour a couple days after Graspop.
Again, there’s valid reasons for the absence of some of those names, but to not get ANY of them feels…strange.