Totally missed this. Your question is a good one. I too would like to know more about the design process and the decisions that made all the Perry sculpted Warhammer human miniatures possible (Bretonnia, Empire, DoW). That other guy asked this already: their take on 3D sculpted miniatures - I'm quite curious about that.
Do you know when the podcast will be online?
PS.: When this forum was much more active, we should have approached the Perrys and should have commissioned a Warhammer-Empire.com collector's miniature (or 2 even - one from each) in celebration of WHFB, the Empire, the Perrys themselves and this community. I'm rather sure they would have been up for it. But I am afraid that we have too few people left here to finance such a thing nowadays.