Personally if it was me now, I would be grabbing a green camping ticket with the knowledge closer when I've refreshed that I can still choose general if I want to....you can't do the opposite!
I would say if you are happy to watch your headliners and big bands further back to be able to see who you actually plan to later then yes it is fine. Its a much difference experience to any other festival especially food wise and camping surrounds.
Once you're in the arena as well you're not going back unless you've got a gap. If I go again I'll be going with the option of not trying to push the front and enjoying further back as you actually put too much pressure on it than the time take away can forget to enjoy other acts.
On the whole then,yay or nay...I've had a look on festivals united and there's people who seem converted by Rock Im Park, I can imagine it might be different if it was a washout as RaR is tarmac.
The hotel side would be more to convince the non campers if it's an option. On my first visit to rock am ring we were shuttled into the area where you could stick the car next to the tent which was fantastic as it meant zero lugging of camping gear.
An interesting thing this. Having seem them several times (some of their gigs veer into back catalogue niche territoty), I partly agree they arent Pyramid material (theough modern defeinition of 'bangers' although I could see them headlinging the Other stage) I can't think of another festival in the world that they couldn't headline - Reading, IoW, BST, Rock Wercheter, Roskilde, etc etc.