That's the key....LESS follow through is more accurate and DOES NOT amplify "off target" contact with the cue ball. The "moment of truth" in the stroke is exactly AT the cue ball, not any further...
strive to extend the TIP through the cue ball....that's all.
I've spent a lot of time "de programming" different player's follow throughs (it takes almost an hour each time).
For some reason the "common knowledge" in the pool world is that a long follow through is better.....and it's not true at all. Same with the "loose grip" (check out the picture of Thorsten H. on the Front Page of the AZ Web Site).....it's an example of "if you tell the same thing over and over it becomes "true," even if it's not" - 'The Game is the Teacher'
This is a very interesting thread too, and this is an interesting turn connecting it to the follow through related ones.
I wanted to point out that when certain champions refer to "long" follow through they do not mean "over-follow", just a "longer" follow through in certain cases, not without reason..
Besides this that "moment of truth" in tip-CB contact is very important as we know and it has variations.. The tip-CB contact time between a soft and a hard tip is only slightly different in terms of time but very different in terms of results..
As far as the grip is concerned again things are very relative.
It's good to advice a firm but loose grip without any space between butt and fingers but again, think of Bustamante's (and others) grip for eg.
Similar thing stands for pause, not adviced in Carom stroke preparation, necessary in Snooker stroke.
So yes, there are average "best" ways but not always applicable for an individual.
You may hold the cue lightly some times, you may pause sometimes and yes you may follow through longer sometimes, all these elements are not a "must", nor do they contradict with any of the "golden" standards, that's all..
Functional approach is one thing, analysis of shot techniques another and so on, everything has limits, players and science too..
"Reasonable" thoughts and techniques can often be the wrong thoughts and techniques to reach the highest levels. To separate yourself you must be "Unreasonable" at times. 'The Game is the Teacher'. CJ Wiley