I belong to a group like this on another site and it seems to work out very well. Novels that are ready for a crit go into a queue (you get to place a novel into the queue once you crit a novel) The novels are not placed onto a forum, but emailed to those that want to read it. There's a 3 timelimit to read crit and then post the crit to a forum.
If the group is five to ten people, then you get more then just one point of view on the novel. The group could be opened to any genre. If this idea does go through and we have a large group, passing on a novel in a genre you don't read won't be a problem.