the bombcast and UPF are their best performing shows, almost certainly because they're consistent and scheduled. people like to know when things are happening. it's ingrained in us to want to know when to expect entertainment we consume. Game of Thrones doesn't come out "sometime this week or maybe next week." as fun of a surprise as the announcement on the panel was, I think the overwhelming majority of fans would have preferred to know that's what they were doing during that time.
also iirc, it was mostly complaining about the lack of content on the west while dan was gone.