You say the fueling is good. What is the AFR @ WOT? @ cruise?
I used to have the cruise dialed in at the 15:1 range for economy, lately with messing with jets, it's a little richer, more like 14:1 when cruising.
WOT, in the 12:1 range, does vary some while it's settling out.
Have some screenshots of datalogs with AFR, speed, MAP, and wheel speed, if you're interested. These are 2nd gear pulls, 1st one just going wot, 2nd trying to smooth out the transition.