It's always a good idea to seek feedback from fans but (and this is NOT a condemnation of what you're doing)... asking those questions here is bound to give you a very limited slice of the pie. After all, the people on this board are probably the diehard C*4 fans and, while their support is admirable, they alone can't support you if you just cater to them. (It's a numbers thing - nothing personal fellas.)
Maybe you've done this?... Hand out feedback questionnaires at your events to the fans as they're leaving. Include a link to an online version of same. Maybe make it worth their while to keep long enough to actually carry home & fill out - a coupon for a couple bucks off their next ticket, a fold-able prepaid postage gimmick... something.
The diehards are gonna come anyway unless you drastically change things (which is unlikely) and maybe what they want isn't what the majority want. How're you gonna know if you don't tap into that majority... and they ain't hanging out here.
I heard of a fed that included a link to an online feedback gimmick on the flyer for their next show that they handed out to people as they were leaving (as opposed to just papering the seats prior to that night's show.) As an incentive they shilled (verbally and on the flyer) that filling out the feedback gimmick online gave entry into a draw for a number of prizes - dvds, t-shirts and the grand prize... free admission for 1 year. Of the 300+ flyers they handed out that night they got a whisker under 200 responses to their online feedback gimmick.
Again, not to diminish or otherwise attach any negatives to what you're doing with this thread... just saying there might be other ways to better reach a more representative sampling of your overall fan base.
Not to kiss ass but Gordo makes a good point. Gimmick the gimmick.