Just curious...in general, why do so many "metal" fans here in the states always make comments about how great the European fests are & wish we had more like those here when those same fests mix it up even more than we do?
As someone whose attended a few European festivals, I'll offer two answers...
1. Those festivals have 50 - 100 bands performing. They also have multiple stages. So... if you don't like 10%, 20% or 30% of the bands, it doesn't much matter. You can just go watch a band you do like, on another stage. At last year's Sweden Rock, my wife watched Electric Light Orchestra while I watched At the Gates. Within the context of a 12 band, single stage festival, people are forced to watch whatever is on the stage.
2. Those festivals tend to bring a general Metal audience. In the states, when promoters cross promote traditional Metal acts with younger Metal acts, they do so to maximize ticket sales, by drawing from different demographics. Personally, I have no desire to see a show with a Killswitch Engage crowd. While I personally don't mind mosh pits, and have been known to jump into a few of them myself, I have no desire to share floor space with folks who feel windmilling and roundhouse kicks are an acceptable part of a pit.
Hmmmm....is it wrong to try to get American fans to accept and appreciate a wider variety bands like the European fans do?
I'm not sure why, as promoters, you're trying to get fans to accept or appreciate anything. It's not the promoter's role to try to change the mentality of fans. Regardless, the simple fact of the matter is, there are cultural differences between American and European audiences.
Mind you, none of this is intended as criticism. I'm not familiar with either Devildriver or Soil, and have no opinion on the quality of either act. I'm simply trying to offer an answer to the question you asked. Like most people, I intend to wait for the remainder of the line up to be announced.
Zod