Systema's use of slow practice fits right into this way of thinking. This nature of training had a major impact upon my own training and influences how I teach. I tell students to only practice at a speed where they are connected with themselves and the other person in a way that they can sustain awareness throughout the entire process of attack-thru execution of technique.
Tactical guys say, "slow is smooth; smooth is fast".
Perhaps we could augment the saying.
"slow and connected is smooth, and smooth is efficient."