I think you're in the minority here with those opinions. You think they're actions are stupid, I think your complaining about it is stupid. I enjoy reunion era Maiden more than any other era despite being a fan since the 90s, and I admire their confidence in their new material over the last decade. How many musicians of their vintage can play over half an hour of new material in a setlist, omitting numerous classics to do so, and get such stellar reviews from long time fans? Its almost unheard of, but in my opinion, and obviously many others, they pull it off.
Otherwise, after a few years of rotating 80s material again and again they would be a total bore live which is what has happened to Metallica. Maiden stay on the forefront by putting confidence into their new material and continue to put on excellent tours as a result.