I think that despite the main stage's previous location being quite obviously better (as far as we can tell so far), I already had struggles last year with how packed it was. For instance, I could arrive at the main stage 5 minutes before a headliner plays and I'd manage a spot with nice visibility. That was just NOT the case last year. I can't recall the miniscule view I had for Gorillaz, all because I stayed and watched Grimes' DJ Set until its end.
So, yeah. The organization can change the stages all it wants, for whatever reason. But last year's issue was never stage related, it's just that they made too many damn tickets available. This festival's charm, partly, is its breathing room, the relaxed nature of seeing multiple names with logistical ease. Last year I felt like I had to plan ahead a simple walk from the second biggest stage (Cupra? I forgot) to the main, otherwise I'd see next to nothing (I'm not that tall, so that's also a factor - I'm 5'6 / 172cm)