How odd... We were sitting in the pub last night pretending we were a think tank for WoTC and over a pint revolutionised their entire line of minatures. I come in to work this morning and find this.
It's not exactly what we were suggesting, but it's a step in the right direction. To summarise, they're doing away with randomised boosters and separating the miniatures line into Heroes and Monsters. Each pack will be semi-randomised pack (some known, some unknown) of either hero style models or monster style models.
What we were proposing was in addition to the fully randomised boosters, having boxed sets of common models, themed to a particular monster type. So while most of your models will still come from the randomly selected boosters, you could also purchase a big bag of Zombies, or a big box of Orc, etc. We toyed with the idea of including a couple hero models in each pack along with a map and scenario leaflet so that each box could be a self contained game unto itself. But the ultimate purpose was to put a big whack of minion style monsters in the hands of GM's while still providing good value to the Miniatures crowd.