This is good feedback. I would recommend adding this to the Ideas section of the community.
I'm sure that you are aware of the global filters (and showing the quick filters) so that a user might use this instead of the exclude/keep only.
Hey Tim thanks for the shout out. But your link is broken. To link to Ideas you need to go to the second tab (All Content) and search for the Idea. Just pasting in the link doesn't work. (As best I can tell this is for Ideas only.) Alex & Dimitri taught me this little wrinkle. Anyway here's the Exclude/Keep Idea you were trying to link to.
Thanks for the replies. I've voted up that idea. :-) Let's see what happens.