There are a few words about a so-called triumvirate of him (he always puts him first!), Steve and Rod, but that doesn't say a lot about the dynamics.
There are plenty of examples in the book where he doesn't.
And I would definetely love to know how certain issues were solved: we know Steve and him didn't agree on the tempo of Flight of Icarus, but we don't have a clue about the way it was sorted out.
Adrian and Bruce put their foot down, quite probably with Martin Birch's approval, and Nicko and Steve reluctantly agreed?
How do they actually work as a band?
In terms of steering the ship, as a triumvirate, at least when it comes to making the most important decisions (especially since 1999). Do you think that is a coincidence that Steve and Bruce are the only ones discussing checking stage set in the footage shown in Behind the Beast?
In terms of the creative aspects, each musician tends to gravitate towards the other band member(s) with whom the creativity flows best. To be honest, I do not know what much Bruce could have added to that.
This is why I first bought the book, not being that interested in the man himself, and I didn't get what I expected.
You did check you were buying Bruce's autobiography, not a book about his time in Iron Maiden, didn't you?
Steve has recently said he would consider to write his autobiography, as he could document the whole Maiden story. It wouldn't be a valuable piece of litterature, to say the least, and I guess we wouldn't get much about his private life (apart from the usual bits about his divorce and the subsequent doom metal masterpiece), but maybe we could expect more about the actual dynamics within the band.
That would be certainly an interesting read, especially anything he could add about those whose contributions have been (allegedly) erased from the official history of the band (e.g. Paul Cairns playing on The Soundhouse Tapes). Anyway, I do not think we are never going to know how the band works even if Steve writes an autobiography himself, as they have always been quite private about this. It keeps the mystique!
By the way, as you know Steve's life much better than most, is there any truth in what was apparently reported by the press in the early 90s, that his divorce was a result of him having an affair with his kids' nanny? It was mentioned over at the Iron Maiden official fan club forum many years ago, but has not resurfaced since.