I agree with your consensus of the smaller the target the more "accurate" the aim. When viewing the pocket I always pick a spot to aim for rather than just the pocket opening. Then I find a spot on the back of the object ball the goes straight through it to that spot in the pocket. Thats what I look at. Now if I had a choice I would shoot all my shots at medium to fast speed (6) so that throw wont enter the equation. With clean balls throw will only come up with 25-45 degree cuts on slow to pocket speed shots. I allow for the throw when throw will come into play, but I still intially aim center pocket as my reference before making adjustments. Now to change the aiming point or to use english. I will chose to complicate the shorter part of the shot if position doesnt matter, as position dictates whether english is needed or not. meaning if the OB is close to the pocket I will change aim for throw. if the VB is close the OB and the OB is farther from the pocket. I will use english. By complicating the shorter part of the shot you can make smaller adjustments minimizing your misses.
Here is some trivia for you on throw. If you put the Object ball on the center spot and the Cue ball on the head spot and shoot the object ball into one of the corner pockets with follow. Will the same aiming point on the Object ball shot with draw go into the same pocket? Both shots are hit at medium speed lets say 4 out of 10, 10 being king kong and 1 being like a feather.
Pm me when you have an answer.
By the way this is a good discussion