"Poor pacing" refers to a situation or experience that feels unbalanced or improperly timed, causing it to be less enjoyable or ineffective. Full definition
I just couldn't get past some of the issues in the game play and poor pacing in the story telling, but I definitely see why the game is so lauded! (vghangover.com)
It's endlessly frustrating to watch an honorable documentary be destroyed by poor pacing. (collider.com)
Poor pacing tends to occur when there isn't a fully developed script for a director to work with and that tends to happen quite a bit more than you think. (thegunnrange.com)