Jim,

Here are my comments I'll build on your's

Absoultely 1.  Reduces rudder sensitivity around neutral
Absolutely 2.  Adds yaw aurhority
Absolutely 3.  Pushes/pulls/ all lock on a little better
Absolutely 4.  Gives "carve" in yaw instead of "skid"
Absolutely 5.  Small heading corrections easier to apply
Yes.  However, I noticed a better transition from point 3 to 4 of the 4 of 8 reversed as a result.  6.  Adds positivie pitching moment with rudder application - how much seems dependant on how tall it is
It has affected my roll mixing.  It acts like additional dihendral.  It stands off about 2 1/2 inches, so probably 1 1/2 or 2 would reduce this 7.  Doesn't affect roll mixing
Agree 8.  Plane will deviate less from the intended line during rolls or point rolls
Agree, I will need to move my battery forward as a result.  Plane holds inverted with very little down elevator now. 9.  CG assessment - allows you to fly a nose-heavy plane as measured statically, but in flight it will  "roll" and maintain 45 lines like a more neutral plane
More stability around neutral in pitch, and roll (very noticeable on a snap exit- it exits softer and more predictable. 10. Elevator - maybe some more pitch authority but not a drastic difference
Less likely to wiggle after stall turn.  11. Stall Turns- some can feel a difference, It is barely noticeable for me
Spin and Snap no adverse effects.  12. Spins/Snaps - uneffected for the conditions I fly (snaps high rate aileron, spins, full rudder/elevator, tiny aileron).

What I can't understand is why the full scale aerobatic planes have not tried this yet.