I think he means the amount of stuff they're showing in each episode.

Like, they're slowing down the pace

i agree, some look almost identical, i'm not sure about the hair color thing, i think that is basically a signature claymore thing, like the silver eyes, because if you look, clare wasnt blonde before becoming a claymore, i think thats something all claymores get when they becoem it, but they could atleast make unique hairstyles to tell em apart =\ your right they are so close...