A while back I came across the pattern that was contained in one of the older versions for 4 barrel.
1 - A - Overlap
2 - B - Strong Single
3 - B - Pitch
4 - D - Four Barrel
5 - E - Closed Closed
6 - A - Elbow
7 - C - Double Shift
8 - A - Standard
9 - A - Standard
10 -D - Dual Horizontal
11 - D-1 -Four Point Combination
12 - A - Standard
13 - A - Standard
14 - A - Standard
15 - A - Standard
16 - A - Standard
17 - A - Standard
18 - A - Standard
19 - C - Drag Loading
20 - E - Wrist Throw
21 - C - End
22 - C - Snap
23 - D - Top Arc and Angled Line
24 - E - Automatic Snap
Difference between 12-1-0 and 12-2-0 in the most recent version are:
I don't have the book so I can't say if Homer called it Hitting or Swinging Pattern.
BUT the four barrel has more in common with the swing pattern than the hitting pattern.
Not sure if the above really helps, I can't but wonder why beyond the reasons stated the Homer would choose to remove this pattern. There must be something that makes this pattern inferrior to the ones he decided to stay with. Don't really know but I think it would be out of character for him to toss(push to the background,etc.) something that could be the best pattern to exist. JMHO.