The look of the HAF isn't something you'd notice when wearing them, but I like them better on a boot. I agree with your take on double soles - don't see a need for them.
I don't like a full Dainte on shoes - too heavy - but I've had 1/2 Dainte soles on some shoes and boots and they turned out rather well. Both EG and G&G offer the 1/2 Dainte.
Good info on the 1/2 Danites, will look into them.
Thanks for sharing.