I don’t know why the processing for the filtering feature would be more that that for an agent, and we know many users have complex sets of agents and rules in their documents already. (Indeed, if Outlines could have filters applied, maybe people would turn less to agents, so the processing cost would be net zero.)
Obviously I can only speculate since understanding processing cost is an Eastgate job. I’m not concerned if the feature is for “advanced users” or beginners. The feature is for anyone who needs it. No doubt if someone needs the feature (like the OP in this thread) then they will look for it and learn it.