I have Ariel brakes on my A10, rear is ok but the front not great. It's not THAT much worse than the 8" in my limited experience from riding 2 other A10s, but I've never tried to improve it, it has the "green" linings, which supposedly are the best, but took 1000s of miles to bed in.
I intend to investigate how to get the brakes to work the best they can by going as far as trying to get some lining material and rivets if necessary, and matching/grinding the shoes to closely fit the drum during operation, to see if that makes a difference. It seems to a bit of an "art" to get linings to fully contact the drum, with single leading shoe brakes.
I was prompted to do this after recently buying some new shoes with bonded linings for the 7" brake on my b31. They worked little better than the (decades old) spongy and worn shoes I took out! On inspection they had a diameter of about 2mm less than the drum (which has not been skimmed by much), so they currently only have a very small contact area with drum, and so will take ages to bed in and get a better contact area. The lining material is also pretty thin. They are EMGO brand and I would not recommend them.
If they were machined/grand to the correct size they would be so thin in the middle section they would not last long......so basically once they are fully bedded in, it will be time to change them.