How I read this: They were quite serious and determined since the very start. By 1983 they had a stable line up for the decades to come. This was the time Steve & Rod had to loosen their grip which they apparently didn't as we had 2 more leaks the following years by Adrian & Bruce.
Reunion time, Gers was not fired which was a great move from Steve. On the other hand Steve started to take credits for all but one song until 2015. Even managed to pissed of Mark the illustrator, best thing happened to Maiden since Riggs if not better (in a way). Not cool.
But yet, no matter the shortcomings they managed to be a band, not an one man show, not as collective as Metallica, Judas Priest or early Sabbath but way more than Megadeth, Annihilator or Iced Earth.