Let's be real, an army that just appears on a White Dwarf to never "to be seen be seen again" it's just bad (hope someone catch that). I mean, after the release (white dwarf, campaing books, ....) it's the support that follows up what I'm talking about.
Of course having a Battletome helps a lot, but again, there are options to start a new army without a mass-release of new and shinny kits.