I gotta say I have no idea why Linkin Park went to Werchter or why some names like RHCP or Foos or Metallica will only go there. I listened to the complete 2025 Werchter lineup and 90% is just soft indie music to pop, lots of acoustic ballad stuff. Stuff that makes Kings of Leon look like deathmetal. Yes, GMM goes way harder in spots, but tonewise those big bands would fit way better here.
If I went only for Park to Werchter I'd be bored the whole day while GMM is like a rock/metal paradise.
On the other hand, these bands raise the price and the buyoritssoldout-pressure a lot... so maybe its better this way.