A bold move, I really hope it pays off
I think this project deserves a lot more backers than we currently have. The minis look great!
I'm planning to use mine for Brettonians (Could have been High Elves too, but I have other plans for them)
I will paint worn leather armour on the AV7 peasants (linemen) and give my knights (throwers and catchers) and yeomen (blitzers) metal armour (AV8). Think it should work out fine
In real life American football, there won't be a difference in the kit of wide receivers or linemen, but everyone knows receivers break more easily, because they're AV6, skinny and weak, while the linemen have high strengt, steel fat-bellies and AV9
I guess the same could be said for Human teams in Blood Bowl, just paint leather torsos on the catchers instead, and things should work out fine. These sculpts are too good to miss IMO