I don't like the idea using a full stroke for different speed controls.
What I mean by this is a lot of weaker player tend to miss easy shots or maybe just stop the ball when they needed 2-3 inches of draw etc.............. because they decelerate when using a full backstroke while trying to hit a ball softly.
IMHO when you need to work on close quarters hitting the ball softly but still needing to maintain your inside kill spin or a small draw shot, the best cue action is a short backstroke with a short follow through. Something like a 2" backstroke with a 2" follow through will allow you to maintain your desired spin while hitting the ball softly.
I agree for potting accuracy short stroke is good but for learning cb speed control and speed consistency same rythmic stroke for most shots is an advantage