Na. The 30-40 year old dudes that would go to that show would hate death grips. Also they're kind of known for sabotaging their own career. I think they knew it was all down hill from here and wanted to quit on top.
I can understand you saying that about Soundgarden and RHCP, but saying NiN and Alice In Chains are overrated? That's pure blasphemy, bite your tongue.
How large of venues do their own tours fill and how many albums do they sell?
Looking them up on youtube it looks like they play clubs unless they were on a festival tour with tons of other groups lol if your tour consists of only clubs in front of a couple hundred people, I'd call that up and coming. If they weren't they would be filling at least a theater or some outdoor pavilions.