Sales are nothing short of great. I don't know why people says otherwise. Well, maybe I do, and it's because last time everything sold out so quickly. But that was the first leg of a 50th anniversary tour after a year off in Europe. Now they're coming back not even a full year after their last EU gig with no changes to the setlist or a big support act. Of course the demand is way lower, but they're still managing to beat some of their previous records (look at Bratislava, Sofia, Lisbon, Milan or Bucharest).
I'm fairly sure people will buy tickets later and that most of these shows will sell out in the end.