| I think you somewhat confuse good market practice: using customer feedback to generate products players will want to buy, with greed: finding ways to force people to buy as much as possible. It should be clear at this point that people uninterested in new, grid-heavy editions would reject the books even if they came free with enough miniatures to plan out basic combat.
Further, I'm personally a fan of tactical grid-based battles. The alternative is the old Final Fantasy style of one party standing on either side of the screen and simply casting whatever they want. Grids give manifest to ideas like searching for cover, sneaking around, setting up flanks, and abusing chokepoints. Opinions will differ, of course, but I am a major fan of grid based combat.
People often ask "why not just play a wargame like WH40K?" but to me it's just not the same. When two or more people sit down to create an adversarial match, they generate armies with equal points and then only generate terrain that is accepted as neutral. With a DM creating tactical situations, he has the opportunity to scale up or down the advantage for one side or the other, as well as allow things leading up to the combat to manifest as advantage. This is far more appealing to me, and even if I am a relatively light roleplayer (out of combat, at least) when I am a PC, to me playing a series of combats in that fashion is more appealing than just playing wargames. | 
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