A very smooth pump stroke kind of begs the question, "why pump?"
I play pump to make the game more interesting, and because there is a certain satisfaction that comes with racking a round. A really smooth open class pump is pretty close to playing with a semi, and it doesn't give the satisfying mechanical element.
I used to play with my CCM when I was worried about getting outgunned, and I felt insecure on the field. As a result, I didn't play well, and the CCM was kind of a dysfunctional crutch. I only bring stockclass guns now, and it is a much more interesting challenge.