It may be because of the promoter paradigm shift of
"Let's get a couple bands that fans of the headliner would like"
"LETS GET A BUNCH OF BANDS, DIVERSIFY SO THERE IS SOMETHING FOR EVERYONE."
ie. a bunch of shit I don't want to see, cut all of the sets shorter to fit everything.
8/20 High on Fire 4free
11/16 Judas Priest