Yes, Patton hasn´t been in the festival since 2009.
As for NIN, I must rather have the Smashing Pumpkins re-union. Sorry to say, but NIN is quite bad teen-angst band
And SP isn't super teen-angsty?
Sorry, I refuse to believe that Corgan is able to get his shit together, less alone the band, before I see it in person.
The past decade's different incarnations of SP have all disappointed me massively, live as well as in recorded form. 'Zeitgeist' was utter, unbridled poop, 'Oceania' mediocre at best, and 'Monuments to an Elegy' insincere wank. He even abandoned the promised second album that was to follow that one just a couple of months after completely.
I'm a huge SP fan and would've given my left testicle to have seen them in their prime, but let's get real: Nothing they've done since their heyday from 1990-2000 has been really good. Even Zwan was better.
In contrast, NIN has consistently released quality stuff both before and after their hiatus. You might not like their style, just like all "angsty" bands aren't to everyone's liking, but they've managed to garner solid reviews all across the board in contrast to Corgan's outfit. And Trent has actually got a proper, functioning band to back him up.