The interest is still there.
There are just WAY too many tours happening at the same time this year.
Last year, they sold out the Orpheum in Boston back in October, which holds 2,700. Not many tours were happening at the same time then.
This summer everybody is on the road. Just checked Ticketmaster. They're playing the Bank of America Pavilion in Boston on July 16th. Holds 5,000 people. Not even halfway sold out yet.