This filter feature is intended to solve the problem of searching CH comments by scrolling down lots of uninteresting comments.
It shows filtered rcomments based on chosen member/designer ; just like the functionality of the one in "Entries" section.
No worries for page view metrics ; you can limit number of displayed comments like it is actually at the moment. and add "View/Load more" button.
Hopefully that gets interest of designers and they'll contribute to emprove it further.