This statement is actually true to some extent. LOTB and the new tour aren't solely based on the 80's albums and I doubt some songs from the 2005 tour will be played live again. But they should play more different songs, no doubt and not only from the 80's.
I think this period was a ''wondering time'' for Maiden - to record albums more often, to play more newer songs in sets (this was the last tour based on an 80's concert videos, they didn't have the mobile game yet), to take longer breaks, Bruce was planning the solo album and tour, Dave wanted to release a solo album with Roy, Steve started his solo project, Adrian had a solo project then.