I think there are probably 50 or so reference shots that need to be worked on, shots that come up all the time, where you also want the cue ball to end up in a certain place or zone. Those shots need to be practiced, because there is an element of feel to each one of them. Bert Kinister's "60 Minute Workout" tape has 27 of them, well worth getting that tape and working on the shots.
For what it's worth, I've developed a "system" that combines finding the contact point on the object ball, and aiming directly through the cue ball at that contact point. Every shot made this way is shot with inside english. Depending on the distance of the cue ball to the object ball, with a very soft stroke, I vary the amount of offset. This works very well for me. It is very important to get a feel for how much your shaft squirts when using this technique. This technique also needs adaptation depending on the cue ball being used, as well as the object balls, and the cloth. However, it works quite consistently for me, and helps me get my "feels" down. With time, shooting more and more firmly will help you get an idea just how much the cue ball will squirt using this technique.
Maybe not for everyone, but it's a keeper in my book. Can it be taught? Yes, I'm certain it can, but if one's stroke is not straight, it will be pretty tough.
Work on delivering a pure, straight stroke. Get that down, then play around with heightening the sense of feel.
Also, be sure to check out Colin Colenso's videos on cue-tv.com to learn all about how different strokes throw object balls differently. Then meld that info into your feel shots.
Any shortcuts? Probably, but potting lots and lots of balls may well prove to be the best shortcut out there.
Flex