Wow... Martial Power is really that high? My problem with the book is that if your group only has one character that's martial, only 1/4 of the book is of use to you, roughly. We have a Ranger (multiclass with Rogue) and a Wizard (multiclass with Ranger), a purebred Fighter, a purebred Warlord, and a purebred Rogue. So yeah, Martial Power is great for my particular group (except for the Paladin and Cleric). But when Arcane Power comes out? Only the Wizard will benefit. Divine? Only the Paladin and Cleric. I'm sure the group dynamics will change as characters come and go, but I guess I just don't see it as "must have".
Chris