I prefer anon periods for the sole fact that without them, people tend to be less likely to read a story by lesser known writers... and miss out on some gems. Anon makes all stories equal, in a way. (Yes, stylistic choices can give away the writers, but in theory, anon helps some writers 'get a break')

Not doing art would be fine. Hammering out requirements is sometimes a headache. I have a rule of thumb for when I run them, but have seen art standards vary hugely by exchange.