There is nothing wrong with chasing performance and numbers, as long as its not at the expense of good form and proper technique. Quality always trumps quantity when it comes to lifting weights. It’s good to move fast and explosively, but don’t rush it and sacrifice form and safety.
Every now and again, I program a workout “not for time.” During these sessions, I ask my athletes to keep their intensity to 70-80% while focusing on good form and proper posture. That can be hard for a CrossFitter who is so used to going heaver and harder each workout, but I try and stress the importance of efficiency. The slower sessions will prepare them for when it is time to go heavy and hard.