I didn't read all the posts so this may have been said already but the Brooks seats are deeply rooted in tradition. And if we look at the traditional bikes of 70 years ago we will see much slacker seat tube angles than anything done now. That means the seatpost was located as much as 4 or 5 cm further back than on a modern bike. So Brooks made their seats accordingly (and in line with best racing practices). Then there is the observed fact that the evolutionary speed of change of the Brooks company is closer to the evolutionary speed of Sequoias and Joshua trees than of fruit flies.
If Brooks seats worked for me, I'd just get the appropriate seatpost or have it made. Given that a Brooks will last many years, what's a couple of hundred $$s and a six month wait?
Ben