Just found some time to share my two cents about post-reunion releases without mentioning studio albums.
2000-2010 - some singles and EPs has some interesting stuff as B'sides (like Futureal and MOTE live 1999 with Bruce, NML B'sides, Focus cover), but most frequently simply some new live takes on classics, some alternative mixed versions, some jams. Live albums were great - pure masterpiece RIR, DOTR is good (especially Journeyman live), Flight 666 is great in taking classics to modern sound. Archives, documentaries, re-issues is great. And also we still having some not released leftovers - ZZ Top and Thin Lizzy covers from 2006, Download 2007 live...
2010-2021 - no singles with b'sides, just promos( Great EV live, great ME88 reissue (that 5.1 mix is perfect), then some average live compilations like NOTD (even vithout accompaniing video) and TBOSLC (imo they'd better also add TOAC and HBTN /but there was a legal problem with Beckett at the time as I remember/ from the first leg, so we got complete TBOS tour live compilation, but at least we have Wacken 2016 broadcast). Some great LP reissues that really made me happy because now I have complete Maiden and Dickinson discography on vinyl. Strange digipack reissue of backcatalogue.
I'm really confused when I see recent Metallica's or Jethro Tull's re-releases with tons of extra materials - why Maiden simply releasing same albums without any bonuses at all? I think they have a lot of great stuff behind the curtain.